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[Search a list of Patent Appplications for class 340]  Class   340COMMUNICATIONS: ELECTRICAL
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[List of Patents for class 340 subclass 850]  850           UNDERWATER
[List of Patents for class 340 subclass 851]  851           Subclass 851 indent level is 1 Ship guidance system
[List of Patents for class 340 subclass 852]  852           Subclass 852 indent level is 1 Electrodes and electrode systems
[List of Patents for class 340 subclass 853.1]  853.1           WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.)
[List of Patents for class 340 subclass 853.2]  853.2           Subclass 853.2 indent level is 1 Diagnostic monitoring or detecting operation of communications equipment or signal
[List of Patents for class 340 subclass 853.3]  853.3           Subclass 853.3 indent level is 1 Selective control of subsurface equipment
[List of Patents for class 340 subclass 853.4]  853.4           Subclass 853.4 indent level is 2 In horizontal or inclined drilling or passage
[List of Patents for class 340 subclass 853.5]  853.5           Subclass 853.5 indent level is 3 Control of drilling apparatus using magnetic field
[List of Patents for class 340 subclass 853.6]  853.6           Subclass 853.6 indent level is 2 Control of drill bit or apparatus (e.g., steering, speed, etc.)
[List of Patents for class 340 subclass 853.7]  853.7           Subclass 853.7 indent level is 1 Repeater in subsurface link (e.g., cable, etc.)
[List of Patents for class 340 subclass 853.8]  853.8           Subclass 853.8 indent level is 1 With orientation sensing of subsurface telemetering equipment (other than drilling equipment)
[List of Patents for class 340 subclass 853.9]  853.9           Subclass 853.9 indent level is 1 Including detail of subsurface signal storage (e.g., memory, recorder, register, etc.)
[List of Patents for class 340 subclass 854.1]  854.1           Subclass 854.1 indent level is 1 With position or depth recording (e.g., line payout, equipment locator, etc.)
[List of Patents for class 340 subclass 854.2]  854.2           Subclass 854.2 indent level is 2 Location of collar or stuck tool
[List of Patents for class 340 subclass 854.3]  854.3           Subclass 854.3 indent level is 1 Using a specific transmission medium (e.g., conductive fluid, annular spacing, etc.)
[List of Patents for class 340 subclass 854.4]  854.4           Subclass 854.4 indent level is 2 Drill string or tubing support signal conduction
[List of Patents for class 340 subclass 854.5]  854.5           Subclass 854.5 indent level is 2 Wellbore casing or ground
[List of Patents for class 340 subclass 854.6]  854.6           Subclass 854.6 indent level is 2 Electromagnetic energy (e.g., radio frequency, etc.)
[List of Patents for class 340 subclass 854.7]  854.7           Subclass 854.7 indent level is 3 Optical link (e.g., waveguide, etc.)
[List of Patents for class 340 subclass 854.8]  854.8           Subclass 854.8 indent level is 3 Near field coupling (e.g., inductive, capacitive, etc.)
[List of Patents for class 340 subclass 854.9]  854.9           Subclass 854.9 indent level is 2 Cable or wire (e.g., conductor as support, etc.)
[List of Patents for class 340 subclass 855.1]  855.1           Subclass 855.1 indent level is 3 Coupling connection structural feature
[List of Patents for class 340 subclass 855.2]  855.2           Subclass 855.2 indent level is 3 Single conductor cable or wire
[List of Patents for class 340 subclass 855.3]  855.3           Subclass 855.3 indent level is 1 Multiplexed signals
[List of Patents for class 340 subclass 855.4]  855.4           Subclass 855.4 indent level is 1 Pulse or digital signal transmission
[List of Patents for class 340 subclass 855.5]  855.5           Subclass 855.5 indent level is 2 Digital signal processing in subsurface transmitter
[List of Patents for class 340 subclass 855.6]  855.6           Subclass 855.6 indent level is 3 Having acoustic sensor
[List of Patents for class 340 subclass 855.7]  855.7           Subclass 855.7 indent level is 1 Modification of signal bandwidth, frequency, or circuit impedance at subsurface location
[List of Patents for class 340 subclass 855.8]  855.8           Subclass 855.8 indent level is 1 Including specified power transmission feature or source (e.g., battery, etc.)
[List of Patents for class 340 subclass 855.9]  855.9           Subclass 855.9 indent level is 2 Specified alternating current (A.C.) circuit feature
[List of Patents for class 340 subclass 856.1]  856.1           Subclass 856.1 indent level is 1 In horizontal or inclined passage arrangement
[List of Patents for class 340 subclass 856.2]  856.2           Subclass 856.2 indent level is 1 With expandable or inflatable sensor element or mounting
[List of Patents for class 340 subclass 856.3]  856.3           Subclass 856.3 indent level is 1 Including particular sensor
[List of Patents for class 340 subclass 856.4]  856.4           Subclass 856.4 indent level is 2 Acoustic or vibratory (e.g., sonic, fluidic, etc.)
[List of Patents for class 340 subclass 870.01]  870.01           CONTINUOUSLY VARIABLE INDICATING (E.G., TELEMETERING)
[List of Patents for class 340 subclass 870.02]  870.02           Subclass 870.02 indent level is 1 With meter reading
[List of Patents for class 340 subclass 870.03]  870.03           Subclass 870.03 indent level is 2 Having plural transmitters
[List of Patents for class 340 subclass 870.04]  870.04           Subclass 870.04 indent level is 1 With calibration
[List of Patents for class 340 subclass 870.05]  870.05           Subclass 870.05 indent level is 1 With calculation
[List of Patents for class 340 subclass 870.06]  870.06           Subclass 870.06 indent level is 2 Plural transmitters (e.g., ratio)
[List of Patents for class 340 subclass 870.07]  870.07           Subclass 870.07 indent level is 1 Combined (TM system with other system)
[List of Patents for class 340 subclass 870.08]  870.08           Subclass 870.08 indent level is 2 Radio dial
[List of Patents for class 340 subclass 870.09]  870.09           Subclass 870.09 indent level is 2 With alarm or annunciator (concurrent with TM)
[List of Patents for class 340 subclass 870.1]  870.1           Subclass 870.1 indent level is 1 For radio sonde
[List of Patents for class 340 subclass 870.11]  870.11           Subclass 870.11 indent level is 1 Plural transmitters
[List of Patents for class 340 subclass 870.12]  870.12           Subclass 870.12 indent level is 2 Frequency division multiplex
[List of Patents for class 340 subclass 870.13]  870.13           Subclass 870.13 indent level is 2 Time division multiplex
[List of Patents for class 340 subclass 870.14]  870.14           Subclass 870.14 indent level is 3 Using particular sync
[List of Patents for class 340 subclass 870.15]  870.15           Subclass 870.15 indent level is 2 With plural receiver
[List of Patents for class 340 subclass 870.16]  870.16           Subclass 870.16 indent level is 1 Condition responsive
[List of Patents for class 340 subclass 870.17]  870.17           Subclass 870.17 indent level is 2 Temperature
[List of Patents for class 340 subclass 870.18]  870.18           Subclass 870.18 indent level is 1 Using a particular modulation (e.g., phase, frequency, or amplitude)
[List of Patents for class 340 subclass 870.19]  870.19           Subclass 870.19 indent level is 2 Pulse
[List of Patents for class 340 subclass 870.2]  870.2           Subclass 870.2 indent level is 3 Pulse repetition
[List of Patents for class 340 subclass 870.21]  870.21           Subclass 870.21 indent level is 3 Analog to digital function converter
[List of Patents for class 340 subclass 870.22]  870.22           Subclass 870.22 indent level is 3 Permutation code
[List of Patents for class 340 subclass 870.23]  870.23           Subclass 870.23 indent level is 3 Increase pulses plus decrease pulses
[List of Patents for class 340 subclass 870.24]  870.24           Subclass 870.24 indent level is 3 Pulse duration (e.g., pulse train)
[List of Patents for class 340 subclass 870.25]  870.25           Subclass 870.25 indent level is 1 Phase variation
[List of Patents for class 340 subclass 870.26]  870.26           Subclass 870.26 indent level is 1 Frequency variation
[List of Patents for class 340 subclass 870.27]  870.27           Subclass 870.27 indent level is 1 Plural circuits, each for particular magnitude
[List of Patents for class 340 subclass 870.28]  870.28           Subclass 870.28 indent level is 1 Via radiant energy beam (via particular energy)
[List of Patents for class 340 subclass 870.29]  870.29           Subclass 870.29 indent level is 2 Photoelectric cell pickup
[List of Patents for class 340 subclass 870.3]  870.3           Subclass 870.3 indent level is 1 With particular transmitter (e.g., piezoelectric, dynamo)
[List of Patents for class 340 subclass 870.31]  870.31           Subclass 870.31 indent level is 2 Inductive transmitter
[List of Patents for class 340 subclass 870.32]  870.32           Subclass 870.32 indent level is 3 Mutual inductance
[List of Patents for class 340 subclass 870.33]  870.33           Subclass 870.33 indent level is 4 Flux valve type (e.g., with movable saturating magnet)
[List of Patents for class 340 subclass 870.34]  870.34           Subclass 870.34 indent level is 4 Self-synchronous type
[List of Patents for class 340 subclass 870.35]  870.35           Subclass 870.35 indent level is 4 Differential type
[List of Patents for class 340 subclass 870.36]  870.36           Subclass 870.36 indent level is 5 Linear variable differential transformer (LVDT)
[List of Patents for class 340 subclass 870.37]  870.37           Subclass 870.37 indent level is 2 Capacitive transmitter
[List of Patents for class 340 subclass 870.38]  870.38           Subclass 870.38 indent level is 2 Resistive transmitter
[List of Patents for class 340 subclass 870.39]  870.39           Subclass 870.39 indent level is 1 With supply voltage regulation or compensation
[List of Patents for class 340 subclass 870.4]  870.4           Subclass 870.4 indent level is 1 With particular receiver (e.g., ratiometer)
[List of Patents for class 340 subclass 870.41]  870.41           Subclass 870.41 indent level is 2 Plural receivers
[List of Patents for class 340 subclass 870.42]  870.42           Subclass 870.42 indent level is 2 With feedback (e.g., reflex along line)
[List of Patents for class 340 subclass 870.43]  870.43           Subclass 870.43 indent level is 3 Follow-up (e.g., circuit rebalanced when upset)
[List of Patents for class 340 subclass 870.44]  870.44           Subclass 870.44 indent level is 2 With discharge device (e.g., CRT)
[List of Patents for class 340 subclass 901]  901           EXTERNAL CONDITION VEHICLE-MOUNTED INDICATOR OR ALARM
[List of Patents for class 340 subclass 902]  902           Subclass 902 indent level is 1 Transmitter in another vehicle (e.g., emergency vehicle)
[List of Patents for class 340 subclass 903]  903           Subclass 903 indent level is 2 Relative distence between vehicles (e.g., collision alert)
[List of Patents for class 340 subclass 904]  904           Subclass 904 indent level is 1 Transmitter in one vehicle only
[List of Patents for class 340 subclass 905]  905           Subclass 905 indent level is 1 Highway information (e.g., weather, speed limits, etc.)
[List of Patents for class 340 subclass 906]  906           OVERRIDE OF TRAFFIC CONTROL INDICATOR BY COMMAND TRANSMITTER
[List of Patents for class 340 subclass 907]  907           TRAFFIC CONTROL INDICATOR
[List of Patents for class 340 subclass 908]  908           Subclass 908 indent level is 1 Portable
[List of Patents for class 340 subclass 908.1]  908.1           Subclass 908.1 indent level is 2 Barricade marker
[List of Patents for class 340 subclass 909]  909           Subclass 909 indent level is 1 Plural intersections under common central station control
[List of Patents for class 340 subclass 910]  910           Subclass 910 indent level is 2 Central station responsive to traffic detectors
[List of Patents for class 340 subclass 911]  911           Subclass 911 indent level is 3 Central station controls offset (time between beginning of same phase at adjacent intersections)
[List of Patents for class 340 subclass 912]  912           Subclass 912 indent level is 2 Standby cycling implemented if invalid transmission received or loss of transmission occurs
[List of Patents for class 340 subclass 913]  913           Subclass 913 indent level is 2 Offset control
[List of Patents for class 340 subclass 914]  914           Subclass 914 indent level is 2 Split control
[List of Patents for class 340 subclass 915]  915           Subclass 915 indent level is 2 Central station includes display of status of indicators
[List of Patents for class 340 subclass 916]  916           Subclass 916 indent level is 1 Intersection normally under local controller
[List of Patents for class 340 subclass 917]  917           Subclass 917 indent level is 2 Controller responsive to traffic detectors
[List of Patents for class 340 subclass 918]  918           Subclass 918 indent level is 3 Controller, when changing right of way, alters or skips normal "go" cycle of street having no traffic detected
[List of Patents for class 340 subclass 919]  919           Subclass 919 indent level is 3 Plural cross highways at intersection each have traffic detectors
[List of Patents for class 340 subclass 920]  920           Subclass 920 indent level is 4 Density determines split
[List of Patents for class 340 subclass 921]  921           Subclass 921 indent level is 5 Extension of time
[List of Patents for class 340 subclass 922]  922           Subclass 922 indent level is 3 Density determines split
[List of Patents for class 340 subclass 923]  923           Subclass 923 indent level is 3 Extension of time
[List of Patents for class 340 subclass 924]  924           Subclass 924 indent level is 2 Local controller can be superceded by central station controller
[List of Patents for class 340 subclass 925]  925           Subclass 925 indent level is 2 Pedestrian control
[List of Patents for class 340 subclass 926]  926           Subclass 926 indent level is 2 Manual setting of cycle length and split times
[List of Patents for class 340 subclass 927]  927           Subclass 927 indent level is 2 Rotating cam structure (specific structure required)
[List of Patents for class 340 subclass 928]  928           Subclass 928 indent level is 1 Combined (e.g., toll systems, one-way)
[List of Patents for class 340 subclass 929]  929           Subclass 929 indent level is 1 Indication of time remaining before change of phase
[List of Patents for class 340 subclass 930]  930           Subclass 930 indent level is 2 Electromechanical movable auxiliary indicator
[List of Patents for class 340 subclass 931]  931           Subclass 931 indent level is 1 Traffic control or local controller failure indicator
[List of Patents for class 340 subclass 932]  932           Subclass 932 indent level is 1 Pacing (e.g., vehicle keeps pace with sequentially activated lights)
[List of Patents for class 340 subclass 932.1]  932.1           Subclass 932.1 indent level is 1 Pivoted
[List of Patents for class 340 subclass 932.2]  932.2           VEHICLE PARKING INDICATORS
[List of Patents for class 340 subclass 933]  933           VEHICLE DETECTORS
[List of Patents for class 340 subclass 934]  934           Subclass 934 indent level is 1 Density
[List of Patents for class 340 subclass 935]  935           Subclass 935 indent level is 1 Discriminates vehicle direction
[List of Patents for class 340 subclass 936]  936           Subclass 936 indent level is 1 Speed and overspeed
[List of Patents for class 340 subclass 937]  937           Subclass 937 indent level is 1 With camera
[List of Patents for class 340 subclass 938]  938           Subclass 938 indent level is 1 Compensation for vehicle remaining at sensor position
[List of Patents for class 340 subclass 939]  939           Subclass 939 indent level is 1 Environmental or drift compensation
[List of Patents for class 340 subclass 940]  940           Subclass 940 indent level is 1 With pneumatic
[List of Patents for class 340 subclass 941]  941           Subclass 941 indent level is 1 Inductive
[List of Patents for class 340 subclass 942]  942           Subclass 942 indent level is 1 Photoelectric
[List of Patents for class 340 subclass 943]  943           Subclass 943 indent level is 1 Sonic or ultrasonic
[List of Patents for class 340 subclass 944]  944           PEDESTRIAN GUIDANCE
[List of Patents for class 340 subclass 945]  945           AIRCRAFT ALARM OR INDICATING SYSTEMS
[List of Patents for class 340 subclass 946]  946           Subclass 946 indent level is 1 Nonairplane (e.g., balloon or helicopter)
[List of Patents for class 340 subclass 947]  947           Subclass 947 indent level is 1 Land-based landing guidance
[List of Patents for class 340 subclass 948]  948           Subclass 948 indent level is 2 Aircraft actuation of land-based landing guides
[List of Patents for class 340 subclass 949]  949           Subclass 949 indent level is 2 Wind direction
[List of Patents for class 340 subclass 950]  950           Subclass 950 indent level is 2 Movable (e.g., rotatable) guides
[List of Patents for class 340 subclass 951]  951           Subclass 951 indent level is 2 Phased landing guidance (e.g., runway approach, landing, touchdown)
[List of Patents for class 340 subclass 952]  952           Subclass 952 indent level is 2 Particular energy guide source (e.g., sound, electric field, radio)
[List of Patents for class 340 subclass 953]  953           Subclass 953 indent level is 3 Visual source
[List of Patents for class 340 subclass 954]  954           Subclass 954 indent level is 4 Alignment of plural sources
[List of Patents for class 340 subclass 955]  955           Subclass 955 indent level is 4 Plural colors
[List of Patents for class 340 subclass 956]  956           Subclass 956 indent level is 4 Modulated light source
[List of Patents for class 340 subclass 957]  957           Subclass 957 indent level is 3 Magnetic field guide
[List of Patents for class 340 subclass 958]  958           Subclass 958 indent level is 1 Docking guidance
[List of Patents for class 340 subclass 959]  959           Subclass 959 indent level is 1 Takeoff indicator
[List of Patents for class 340 subclass 960]  960           Subclass 960 indent level is 1 Landing gear indicator
[List of Patents for class 340 subclass 961]  961           Subclass 961 indent level is 1 Potential collision with other aircraft
[List of Patents for class 340 subclass 962]  962           Subclass 962 indent level is 1 Icing indicator
[List of Patents for class 340 subclass 963]  963           Subclass 963 indent level is 1 Flight alarm
[List of Patents for class 340 subclass 964]  964           Subclass 964 indent level is 2 Phased warnings for same flight condition
[List of Patents for class 340 subclass 965]  965           Subclass 965 indent level is 2 Tactile
[List of Patents for class 340 subclass 966]  966           Subclass 966 indent level is 2 Stall
[List of Patents for class 340 subclass 967]  967           Subclass 967 indent level is 2 Attitude (including yaw, angle of attack, roll, pitch, glide slope)
[List of Patents for class 340 subclass 968]  968           Subclass 968 indent level is 2 Wind shear
[List of Patents for class 340 subclass 969]  969           Subclass 969 indent level is 2 Speed
[List of Patents for class 340 subclass 970]  970           Subclass 970 indent level is 2 Altitude
[List of Patents for class 340 subclass 971]  971           Subclass 971 indent level is 1 Nonalarm flight indicator
[List of Patents for class 340 subclass 972]  972           Subclass 972 indent level is 2 Runway presentation
[List of Patents for class 340 subclass 973]  973           Subclass 973 indent level is 2 Indicator of at least four flight parameters (altitude, speed, etc.)
[List of Patents for class 340 subclass 974]  974           Subclass 974 indent level is 2 Attitude
[List of Patents for class 340 subclass 975]  975           Subclass 975 indent level is 3 Roll or pitch
[List of Patents for class 340 subclass 976]  976           Subclass 976 indent level is 3 Glide slope or path
[List of Patents for class 340 subclass 977]  977           Subclass 977 indent level is 2 Altitude
[List of Patents for class 340 subclass 978]  978           Subclass 978 indent level is 2 Speed
[List of Patents for class 340 subclass 979]  979           Subclass 979 indent level is 2 Heading (includes deviation from desired course)
[List of Patents for class 340 subclass 980]  980           Subclass 980 indent level is 2 Indicator visible in pilot's line of sight through windscreen
[List of Patents for class 340 subclass 981]  981           Subclass 981 indent level is 1 Aircraft beacons
[List of Patents for class 340 subclass 982]  982           Subclass 982 indent level is 2 Lights communicate (e.g., direction, altitude, reference position to observer)
[List of Patents for class 340 subclass 983]  983           Subclass 983 indent level is 1 Obstruction beacon
[List of Patents for class 340 subclass 984]  984           WATERCRAFT ALARM OR INDICATING SYSTEMS
[List of Patents for class 340 subclass 985]  985           Subclass 985 indent level is 1 Navigation guides (e.g., channel lights)
[List of Patents for class 340 subclass 986]  986           Subclass 986 indent level is 1 Anchor movement
[List of Patents for class 340 subclass 987]  987           Subclass 987 indent level is 1 Rudder position indicator
[List of Patents for class 340 subclass 988]  988           VEHICLE POSITION INDICATION
[List of Patents for class 340 subclass 989]  989           Subclass 989 indent level is 1 At remote location
[List of Patents for class 340 subclass 990]  990           Subclass 990 indent level is 2 With map display
[List of Patents for class 340 subclass 991]  991           Subclass 991 indent level is 2 Position indication transmitted by vehicle after receipt of information from local station
[List of Patents for class 340 subclass 992]  992           Subclass 992 indent level is 2 Position indication transmitted at periodic intervals (e.g., distance travelled)
[List of Patents for class 340 subclass 993]  993           Subclass 993 indent level is 2 Position indication transmitted by local station to remote location
[List of Patents for class 340 subclass 994]  994           Subclass 994 indent level is 2 Vehicle's arrival or expected arrival at remote location along route indicated at that remote location (e.g., bus arrival systems)
[List of Patents for class 340 subclass 995.1]  995.1           Subclass 995.1 indent level is 1 Map display
[List of Patents for class 340 subclass 995.11]  995.11           Subclass 995.11 indent level is 2 Having plural maps
[List of Patents for class 340 subclass 995.12]  995.12           Subclass 995.12 indent level is 2 Transmission of map data to vehicle
[List of Patents for class 340 subclass 995.13]  995.13           Subclass 995.13 indent level is 3 Traffic information
[List of Patents for class 340 subclass 995.14]  995.14           Subclass 995.14 indent level is 2 Manipulation of map display or data
[List of Patents for class 340 subclass 995.15]  995.15           Subclass 995.15 indent level is 3 Having adjustable map (e.g., scalable, etc.)
[List of Patents for class 340 subclass 995.16]  995.16           Subclass 995.16 indent level is 4 Input device
[List of Patents for class 340 subclass 995.17]  995.17           Subclass 995.17 indent level is 4 Display change based on vehicle position
[List of Patents for class 340 subclass 995.18]  995.18           Subclass 995.18 indent level is 3 Particular data storage
[List of Patents for class 340 subclass 995.19]  995.19           Subclass 995.19 indent level is 2 Route determination and display on map
[List of Patents for class 340 subclass 995.2]  995.2           Subclass 995.2 indent level is 3 Intersection turn guidance
[List of Patents for class 340 subclass 995.21]  995.21           Subclass 995.21 indent level is 4 Off course, route re-search
[List of Patents for class 340 subclass 995.22]  995.22           Subclass 995.22 indent level is 5 Pattern matching
[List of Patents for class 340 subclass 995.23]  995.23           Subclass 995.23 indent level is 5 Specifying particular start/destination
[List of Patents for class 340 subclass 995.24]  995.24           Subclass 995.24 indent level is 2 Including landmark information
[List of Patents for class 340 subclass 995.25]  995.25           Subclass 995.25 indent level is 2 Including vehicle position correction
[List of Patents for class 340 subclass 995.26]  995.26           Subclass 995.26 indent level is 2 Including particular display structure (e.g., detachable, rolling map sheet, etc.)
[List of Patents for class 340 subclass 995.27]  995.27           Subclass 995.27 indent level is 2 Including particular display feature (e.g., indication of direction, mileage, road type, etc.)
[List of Patents for class 340 subclass 995.28]  995.28           Subclass 995.28 indent level is 2 Including particular position/direction sensor
[List of Patents for class 340 subclass 996]  996           Subclass 996 indent level is 1 Prerecorded message describes position
[List of Patents for class 340 subclass 425.5]  425.5           LAND VEHICLE ALARMS OR INDICATORS
[List of Patents for class 340 subclass 426.1]  426.1           Subclass 426.1 indent level is 1 Of burglary or unauthorized use
[List of Patents for class 340 subclass 427]  427           Subclass 427 indent level is 2 Of motorcycles or bicycles
[List of Patents for class 340 subclass 428]  428           Subclass 428 indent level is 2 Responsive to changes in voltage or current in a vehicle electrical system
[List of Patents for class 340 subclass 429]  429           Subclass 429 indent level is 2 Responsive to inertia, vibration, or tilt
[List of Patents for class 340 subclass 430]  430           Subclass 430 indent level is 2 With entrance/exit time delay
[List of Patents for class 340 subclass 426.11]  426.11           Subclass 426.11 indent level is 2 Including immobilization
[List of Patents for class 340 subclass 426.12]  426.12           Subclass 426.12 indent level is 3 User activated (e.g., car-jacking, etc.)
[List of Patents for class 340 subclass 426.13]  426.13           Subclass 426.13 indent level is 2 Remote control
[List of Patents for class 340 subclass 426.14]  426.14           Subclass 426.14 indent level is 3 Programmable
[List of Patents for class 340 subclass 426.15]  426.15           Subclass 426.15 indent level is 3 Status indication
[List of Patents for class 340 subclass 426.16]  426.16           Subclass 426.16 indent level is 3 Transmitter and receiver in vehicle
[List of Patents for class 340 subclass 426.17]  426.17           Subclass 426.17 indent level is 3 Transmitter on user
[List of Patents for class 340 subclass 426.18]  426.18           Subclass 426.18 indent level is 2 Remote alarm
[List of Patents for class 340 subclass 426.19]  426.19           Subclass 426.19 indent level is 3 Using GPS (i.e., location)
[List of Patents for class 340 subclass 426.2]  426.2           Subclass 426.2 indent level is 3 Cellular
[List of Patents for class 340 subclass 426.21]  426.21           Subclass 426.21 indent level is 3 Paging
[List of Patents for class 340 subclass 426.22]  426.22           Subclass 426.22 indent level is 2 Local indication
[List of Patents for class 340 subclass 426.23]  426.23           Subclass 426.23 indent level is 3 Exterior of vehicle
[List of Patents for class 340 subclass 426.24]  426.24           Subclass 426.24 indent level is 2 Including specified sensor
[List of Patents for class 340 subclass 426.25]  426.25           Subclass 426.25 indent level is 3 Plural diverse sensors
[List of Patents for class 340 subclass 426.26]  426.26           Subclass 426.26 indent level is 3 Detecting intruder energy (e.g., infrared, etc.)
[List of Patents for class 340 subclass 426.27]  426.27           Subclass 426.27 indent level is 3 Window (i.e., glass)
[List of Patents for class 340 subclass 426.28]  426.28           Subclass 426.28 indent level is 3 Door or lock
[List of Patents for class 340 subclass 426.29]  426.29           Subclass 426.29 indent level is 3 Trunk or hood
[List of Patents for class 340 subclass 426.3]  426.3           Subclass 426.3 indent level is 3 Ignition switch
[List of Patents for class 340 subclass 426.31]  426.31           Subclass 426.31 indent level is 3 Steering wheel
[List of Patents for class 340 subclass 426.32]  426.32           Subclass 426.32 indent level is 3 Brake
[List of Patents for class 340 subclass 426.33]  426.33           Subclass 426.33 indent level is 3 Wheel/tire
[List of Patents for class 340 subclass 426.34]  426.34           Subclass 426.34 indent level is 3 Accessory (e.g., speaker, radio face plate, etc.)
[List of Patents for class 340 subclass 426.35]  426.35           Subclass 426.35 indent level is 2 Including programmable key
[List of Patents for class 340 subclass 426.36]  426.36           Subclass 426.36 indent level is 2 Including keyless entry
[List of Patents for class 340 subclass 431]  431           Subclass 431 indent level is 1 For trailer
[List of Patents for class 340 subclass 432]  432           Subclass 432 indent level is 1 For bicycle
[List of Patents for class 340 subclass 433]  433           Subclass 433 indent level is 1 For school bus
[List of Patents for class 340 subclass 434]  434           Subclass 434 indent level is 1 For taxi
[List of Patents for class 340 subclass 435]  435           Subclass 435 indent level is 1 Of relative distance from an obstacle
[List of Patents for class 340 subclass 436]  436           Subclass 436 indent level is 1 Of collision or contact with external object
[List of Patents for class 340 subclass 437]  437           Subclass 437 indent level is 2 Curb
[List of Patents for class 340 subclass 438]  438           Subclass 438 indent level is 1 Internal alarm or indicator responsive to a condition of the vehicle
[List of Patents for class 340 subclass 439]  439           Subclass 439 indent level is 2 Operation efficiency (e.g., engine performance, driver habits)
[List of Patents for class 340 subclass 440]  440           Subclass 440 indent level is 2 Tilt, imbalance, or overload
[List of Patents for class 340 subclass 441]  441           Subclass 441 indent level is 2 Speed of vehicle, engine, or power train
[List of Patents for class 340 subclass 442]  442           Subclass 442 indent level is 2 Tire deflation or inflation
[List of Patents for class 340 subclass 443]  443           Subclass 443 indent level is 3 By indirect detection means (e.g., height measurement)
[List of Patents for class 340 subclass 444]  444           Subclass 444 indent level is 4 Relative wheel speed
[List of Patents for class 340 subclass 445]  445           Subclass 445 indent level is 3 With particular telemetric coupling
[List of Patents for class 340 subclass 446]  446           Subclass 446 indent level is 4 Acoustic wave
[List of Patents for class 340 subclass 447]  447           Subclass 447 indent level is 4 Radio wave
[List of Patents for class 340 subclass 448]  448           Subclass 448 indent level is 4 Inductive
[List of Patents for class 340 subclass 449]  449           Subclass 449 indent level is 2 Temperature
[List of Patents for class 340 subclass 450]  450           Subclass 450 indent level is 2 Fluid level
[List of Patents for class 340 subclass 450.1]  450.1           Subclass 450.1 indent level is 3 Of hydraulic brake fluid
[List of Patents for class 340 subclass 450.2]  450.2           Subclass 450.2 indent level is 3 Of fuel
[List of Patents for class 340 subclass 450.3]  450.3           Subclass 450.3 indent level is 3 Of lubricant (e.g., engine oil)
[List of Patents for class 340 subclass 451]  451           Subclass 451 indent level is 2 Fluid pressure
[List of Patents for class 340 subclass 452]  452           Subclass 452 indent level is 3 Of brake fluid
[List of Patents for class 340 subclass 453]  453           Subclass 453 indent level is 2 Brake or clutch condition
[List of Patents for class 340 subclass 454]  454           Subclass 454 indent level is 3 Wear
[List of Patents for class 340 subclass 455]  455           Subclass 455 indent level is 2 Battery charging system condition
[List of Patents for class 340 subclass 456]  456           Subclass 456 indent level is 2 Gear position
[List of Patents for class 340 subclass 457]  457           Subclass 457 indent level is 2 Reminder
[List of Patents for class 340 subclass 457.1]  457.1           Subclass 457.1 indent level is 3 Of seat belt application
[List of Patents for class 340 subclass 457.2]  457.2           Subclass 457.2 indent level is 3 Of headlight energization
[List of Patents for class 340 subclass 457.3]  457.3           Subclass 457.3 indent level is 3 Of parking brake application
[List of Patents for class 340 subclass 457.4]  457.4           Subclass 457.4 indent level is 3 Of service interval expiration
[List of Patents for class 340 subclass 458]  458           Subclass 458 indent level is 2 Lamp or lamp circuit condition
[List of Patents for class 340 subclass 459]  459           Subclass 459 indent level is 2 Plural conditions
[List of Patents for class 340 subclass 460]  460           Subclass 460 indent level is 3 With voice warning
[List of Patents for class 340 subclass 461]  461           Subclass 461 indent level is 3 With particular display means
[List of Patents for class 340 subclass 462]  462           Subclass 462 indent level is 4 Digital
[List of Patents for class 340 subclass 463]  463           Subclass 463 indent level is 1 External alarm or indicator of movement
[List of Patents for class 340 subclass 464]  464           Subclass 464 indent level is 2 Plural indications (e.g., go, slow, stop)
[List of Patents for class 340 subclass 465]  465           Subclass 465 indent level is 2 Turning or steering
[List of Patents for class 340 subclass 466]  466           Subclass 466 indent level is 2 Speed
[List of Patents for class 340 subclass 467]  467           Subclass 467 indent level is 2 Acceleration or deceleration
[List of Patents for class 340 subclass 468]  468           Subclass 468 indent level is 1 External signal light system
[List of Patents for class 340 subclass 469]  469           Subclass 469 indent level is 2 With two or more intensity levels (e.g., day or night)
[List of Patents for class 340 subclass 470]  470           Subclass 470 indent level is 2 Pass - no pass
[List of Patents for class 340 subclass 471]  471           Subclass 471 indent level is 2 Hazard warning or distress signalling
[List of Patents for class 340 subclass 472]  472           Subclass 472 indent level is 3 Auxiliary signal permanently attached to vehicle
[List of Patents for class 340 subclass 473]  473           Subclass 473 indent level is 3 Portable signal
[List of Patents for class 340 subclass 474]  474           Subclass 474 indent level is 2 With audible signal
[List of Patents for class 340 subclass 475]  475           Subclass 475 indent level is 2 Turn signal
[List of Patents for class 340 subclass 476]  476           Subclass 476 indent level is 3 With automatic cancelling
[List of Patents for class 340 subclass 477]  477           Subclass 477 indent level is 4 By predetermined time interval or distance
[List of Patents for class 340 subclass 478]  478           Subclass 478 indent level is 3 With plural bulbs sequentially flashed
[List of Patents for class 340 subclass 479]  479           Subclass 479 indent level is 2 Brake light
[List of Patents for class 340 subclass 480]  480           Subclass 480 indent level is 1 Electromagnetically actuated mechanical signal
[List of Patents for class 340 subclass 481]  481           Subclass 481 indent level is 2 Wigwag type
[List of Patents for class 340 subclass 482]  482           Subclass 482 indent level is 2 Normally encased
[List of Patents for class 340 subclass 483]  483           Subclass 483 indent level is 3 Plural concurrent indicators
[List of Patents for class 340 subclass 484]  484           Subclass 484 indent level is 3 Sliding sign or shutter
[List of Patents for class 340 subclass 485]  485           Subclass 485 indent level is 3 Window exhibited sign or shutter
[List of Patents for class 340 subclass 486]  486           Subclass 486 indent level is 4 Drum
[List of Patents for class 340 subclass 487]  487           Subclass 487 indent level is 2 Pivoting
[List of Patents for class 340 subclass 488]  488           Subclass 488 indent level is 3 Multiple indicators
[List of Patents for class 340 subclass 489]  489           Subclass 489 indent level is 3 Three or more positions
[List of Patents for class 340 subclass 490]  490           Subclass 490 indent level is 4 Vertical axis
[List of Patents for class 340 subclass 146.2]  146.2           DIGITAL COMPARATOR SYSTEMS
[List of Patents for class 340 subclass 500]  500           CONDITION RESPONSIVE INDICATING SYSTEM
[List of Patents for class 340 subclass 501]  501           Subclass 501 indent level is 1 With particular system function (e.g., temperature compensation, calibration)
[List of Patents for class 340 subclass 502]  502           Subclass 502 indent level is 2 Acknowledgement
[List of Patents for class 340 subclass 503]  503           Subclass 503 indent level is 3 With ringback
[List of Patents for class 340 subclass 504]  504           Subclass 504 indent level is 2 Answer-back
[List of Patents for class 340 subclass 505]  505           Subclass 505 indent level is 2 Interrogator-responder
[List of Patents for class 340 subclass 506]  506           Subclass 506 indent level is 2 Alarm system supervision
[List of Patents for class 340 subclass 507]  507           Subclass 507 indent level is 3 Fail-safe
[List of Patents for class 340 subclass 508]  508           Subclass 508 indent level is 3 Redundant (e.g., added circuit or loop)
[List of Patents for class 340 subclass 509]  509           Subclass 509 indent level is 3 Plural or diverse current sources
[List of Patents for class 340 subclass 510]  510           Subclass 510 indent level is 3 Bridge or potential divider
[List of Patents for class 340 subclass 511]  511           Subclass 511 indent level is 3 Threshold or window (e.g., of analog electrical level)
[List of Patents for class 340 subclass 512]  512           Subclass 512 indent level is 3 Pulse
[List of Patents for class 340 subclass 513]  513           Subclass 513 indent level is 3 Diode
[List of Patents for class 340 subclass 514]  514           Subclass 514 indent level is 2 Testing
[List of Patents for class 340 subclass 515]  515           Subclass 515 indent level is 3 Simulation of condition
[List of Patents for class 340 subclass 516]  516           Subclass 516 indent level is 3 Automatic (e.g., periodic, start-up)
[List of Patents for class 340 subclass 517]  517           Subclass 517 indent level is 2 Selection from a plurality of sensed conditions
[List of Patents for class 340 subclass 518]  518           Subclass 518 indent level is 3 Scanning
[List of Patents for class 340 subclass 519]  519           Subclass 519 indent level is 3 Worst condition
[List of Patents for class 340 subclass 520]  520           Subclass 520 indent level is 3 First sensed exclusively indicated
[List of Patents for class 340 subclass 521]  521           Subclass 521 indent level is 3 Plural diverse conditions
[List of Patents for class 340 subclass 522]  522           Subclass 522 indent level is 4 Combined for response
[List of Patents for class 340 subclass 523]  523           Subclass 523 indent level is 3 Particular sequence of conditions
[List of Patents for class 340 subclass 524]  524           Subclass 524 indent level is 3 Condition position indicator
[List of Patents for class 340 subclass 525]  525           Subclass 525 indent level is 4 Display board
[List of Patents for class 340 subclass 526]  526           Subclass 526 indent level is 2 Predetermined rate of occurrence
[List of Patents for class 340 subclass 527]  527           Subclass 527 indent level is 2 Time delay
[List of Patents for class 340 subclass 528]  528           Subclass 528 indent level is 3 Entrance/exit
[List of Patents for class 340 subclass 529]  529           Subclass 529 indent level is 3 Condition persistence
[List of Patents for class 340 subclass 530]  530           Subclass 530 indent level is 4 Capacitor
[List of Patents for class 340 subclass 531]  531           Subclass 531 indent level is 1 With particular coupling link
[List of Patents for class 340 subclass 532]  532           Subclass 532 indent level is 2 Having particular safety function
[List of Patents for class 340 subclass 533]  533           Subclass 533 indent level is 2 Wired
[List of Patents for class 340 subclass 534]  534           Subclass 534 indent level is 3 Coded message
[List of Patents for class 340 subclass 535]  535           Subclass 535 indent level is 4 Mechanical code means (e.g., coded disc)
[List of Patents for class 340 subclass 536]  536           Subclass 536 indent level is 3 Noninterfering
[List of Patents for class 340 subclass 537]  537           Subclass 537 indent level is 3 With impedance level coding
[List of Patents for class 340 subclass 538]  538           Subclass 538 indent level is 3 Combined with power line
[List of Patents for class 340 subclass 539.1]  539.1           Subclass 539.1 indent level is 2 Radio
[List of Patents for class 340 subclass 539.11]  539.11           Subclass 539.11 indent level is 3 Including personal portable device
[List of Patents for class 340 subclass 539.12]  539.12           Subclass 539.12 indent level is 4 Medical
[List of Patents for class 340 subclass 539.13]  539.13           Subclass 539.13 indent level is 4 Tracking location (e.g., GPS, etc.)
[List of Patents for class 340 subclass 539.14]  539.14           Subclass 539.14 indent level is 3 Including remote residential device
[List of Patents for class 340 subclass 539.15]  539.15           Subclass 539.15 indent level is 4 Parent/child device
[List of Patents for class 340 subclass 539.16]  539.16           Subclass 539.16 indent level is 3 Including central station detail
[List of Patents for class 340 subclass 539.17]  539.17           Subclass 539.17 indent level is 4 And remote station detail
[List of Patents for class 340 subclass 539.18]  539.18           Subclass 539.18 indent level is 5 Dispatching
[List of Patents for class 340 subclass 539.19]  539.19           Subclass 539.19 indent level is 5 Programmable
[List of Patents for class 340 subclass 539.2]  539.2           Subclass 539.2 indent level is 4 Map
[List of Patents for class 340 subclass 539.21]  539.21           Subclass 539.21 indent level is 4 Signal strength
[List of Patents for class 340 subclass 539.22]  539.22           Subclass 539.22 indent level is 3 Having plural distinct sensors (i.e., for surrounding conditions)
[List of Patents for class 340 subclass 539.23]  539.23           Subclass 539.23 indent level is 4 Proximity
[List of Patents for class 340 subclass 539.24]  539.24           Subclass 539.24 indent level is 4 Diagnostic
[List of Patents for class 340 subclass 539.25]  539.25           Subclass 539.25 indent level is 4 Including video
[List of Patents for class 340 subclass 539.26]  539.26           Subclass 539.26 indent level is 3 Specific environmental sensor
[List of Patents for class 340 subclass 539.27]  539.27           Subclass 539.27 indent level is 4 Heat
[List of Patents for class 340 subclass 539.28]  539.28           Subclass 539.28 indent level is 4 Weather
[List of Patents for class 340 subclass 539.29]  539.29           Subclass 539.29 indent level is 4 Dosimeter
[List of Patents for class 340 subclass 539.3]  539.3           Subclass 539.3 indent level is 3 Including power saving
[List of Patents for class 340 subclass 539.31]  539.31           Subclass 539.31 indent level is 3 Including tamper resistant device
[List of Patents for class 340 subclass 539.32]  539.32           Subclass 539.32 indent level is 3 Including location of misplaced item
[List of Patents for class 340 subclass 540]  540           Subclass 540 indent level is 1 Specific condition
[List of Patents for class 340 subclass 541]  541           Subclass 541 indent level is 2 Intrusion detection
[List of Patents for class 340 subclass 542]  542           Subclass 542 indent level is 3 Lock
[List of Patents for class 340 subclass 543]  543           Subclass 543 indent level is 4 Permutation
[List of Patents for class 340 subclass 544]  544           Subclass 544 indent level is 3 Disturbance of fluid pressure
[List of Patents for class 340 subclass 545.1]  545.1           Subclass 545.1 indent level is 3 Door or window movement
[List of Patents for class 340 subclass 546]  546           Subclass 546 indent level is 4 Portable
[List of Patents for class 340 subclass 545.2]  545.2           Subclass 545.2 indent level is 4 Specified sensor
[List of Patents for class 340 subclass 547]  547           Subclass 547 indent level is 5 Magnetic sensor
[List of Patents for class 340 subclass 548]  548           Subclass 548 indent level is 5 Plug or cord tension sensor
[List of Patents for class 340 subclass 549]  549           Subclass 549 indent level is 5 Rotatable sensor
[List of Patents for class 340 subclass 545.3]  545.3           Subclass 545.3 indent level is 5 Sensing of electromagnetic energy (e.g., light, infrared, or microwave)
[List of Patents for class 340 subclass 545.4]  545.4           Subclass 545.4 indent level is 5 Sensing of electrical parameter (e.g., piezoelectricity or capacitance)
[List of Patents for class 340 subclass 545.5]  545.5           Subclass 545.5 indent level is 5 Inertia-type sensor (e.g., mercury or pendulum switch)
[List of Patents for class 340 subclass 545.6]  545.6           Subclass 545.6 indent level is 4 Door, cover, or lid for self-contained article (e.g., refrigerator, mailbox, drawer, cabinet, or box)
[List of Patents for class 340 subclass 545.7]  545.7           Subclass 545.7 indent level is 4 Specified door or window portion (e.g., doorknob)
[List of Patents for class 340 subclass 545.8]  545.8           Subclass 545.8 indent level is 4 Specified door or window attachment (e.g., shade or blind)
[List of Patents for class 340 subclass 545.9]  545.9           Subclass 545.9 indent level is 4 Plural doors or windows
[List of Patents for class 340 subclass 550]  550           Subclass 550 indent level is 3 Partition penetration
[List of Patents for class 340 subclass 551]  551           Subclass 551 indent level is 3 Disturbance of magnetic field
[List of Patents for class 340 subclass 552]  552           Subclass 552 indent level is 3 Disturbance of electromagnetic waves
[List of Patents for class 340 subclass 553]  553           Subclass 553 indent level is 4 Standing waves
[List of Patents for class 340 subclass 554]  554           Subclass 554 indent level is 4 Doppler effect
[List of Patents for class 340 subclass 555]  555           Subclass 555 indent level is 4 Light
[List of Patents for class 340 subclass 556]  556           Subclass 556 indent level is 5 Beam
[List of Patents for class 340 subclass 557]  557           Subclass 557 indent level is 6 Laser
[List of Patents for class 340 subclass 561]  561           Subclass 561 indent level is 3 Disturbance of electric field
[List of Patents for class 340 subclass 562]  562           Subclass 562 indent level is 4 Capacitance
[List of Patents for class 340 subclass 563]  563           Subclass 563 indent level is 5 With bridge
[List of Patents for class 340 subclass 564]  564           Subclass 564 indent level is 5 Fence
[List of Patents for class 340 subclass 565]  565           Subclass 565 indent level is 3 Responsive to intruder energy
[List of Patents for class 340 subclass 566]  566           Subclass 566 indent level is 4 Vibration
[List of Patents for class 340 subclass 567]  567           Subclass 567 indent level is 4 Electromagnetic energy
[List of Patents for class 340 subclass 568.1]  568.1           Subclass 568.1 indent level is 2 Article placement or removal (e.g., anti-theft)
[List of Patents for class 340 subclass 568.2]  568.2           Subclass 568.2 indent level is 3 Signal-carrying conduit between sensor and article (e.g., cable, power cord, or data link)
[List of Patents for class 340 subclass 568.3]  568.3           Subclass 568.3 indent level is 4 Power cord
[List of Patents for class 340 subclass 568.4]  568.4           Subclass 568.4 indent level is 4 Specified connector (e.g., phone jack-type plug)
[List of Patents for class 340 subclass 568.5]  568.5           Subclass 568.5 indent level is 3 Shopping cart or item thereon
[List of Patents for class 340 subclass 568.6]  568.6           Subclass 568.6 indent level is 3 Sporting equipment (e.g., golfbag, club, cart, or skis)
[List of Patents for class 340 subclass 568.7]  568.7           Subclass 568.7 indent level is 3 Currency, credit card, or container therefor (e.g., wallet or handbag)
[List of Patents for class 340 subclass 568.8]  568.8           Subclass 568.8 indent level is 3 Article on pedestal, in display case, or mounted on wall (e.g., work of art)
[List of Patents for class 340 subclass 569]  569           Subclass 569 indent level is 3 Mailbox
[List of Patents for class 340 subclass 570]  570           Subclass 570 indent level is 3 Drawer
[List of Patents for class 340 subclass 571]  571           Subclass 571 indent level is 3 Alarm on protected article
[List of Patents for class 340 subclass 572.1]  572.1           Subclass 572.1 indent level is 3 Detectable device on protected article (e.g., "tag")
[List of Patents for class 340 subclass 572.2]  572.2           Subclass 572.2 indent level is 4 Specified relationship between field and detection frequencies (e.g., nth order harmonics)
[List of Patents for class 340 subclass 572.3]  572.3           Subclass 572.3 indent level is 4 Deactivatable by means other than mere removal
[List of Patents for class 340 subclass 572.4]  572.4           Subclass 572.4 indent level is 4 Specified processing arrangement for detected signal
[List of Patents for class 340 subclass 572.5]  572.5           Subclass 572.5 indent level is 4 Having tuned resonant circuit
[List of Patents for class 340 subclass 572.6]  572.6           Subclass 572.6 indent level is 4 Having "soft" magnetic element (e.g., Permalloy)
[List of Patents for class 340 subclass 572.7]  572.7           Subclass 572.7 indent level is 4 Specified antenna structure
[List of Patents for class 340 subclass 572.8]  572.8           Subclass 572.8 indent level is 4 Specified device housing or attachment means
[List of Patents for class 340 subclass 572.9]  572.9           Subclass 572.9 indent level is 5 Having means locking device to article
[List of Patents for class 340 subclass 573.1]  573.1           Subclass 573.1 indent level is 2 Human or animal
[List of Patents for class 340 subclass 574]  574           Subclass 574 indent level is 3 Holdup
[List of Patents for class 340 subclass 575]  575           Subclass 575 indent level is 3 Sleep
[List of Patents for class 340 subclass 576]  576           Subclass 576 indent level is 3 Drive capability
[List of Patents for class 340 subclass 573.2]  573.2           Subclass 573.2 indent level is 3 Nondomestic animal (e.g., for hunting, fishing, or repelling)
[List of Patents for class 340 subclass 573.3]  573.3           Subclass 573.3 indent level is 3 Domestic animal training, monitoring, or controlling
[List of Patents for class 340 subclass 573.4]  573.4           Subclass 573.4 indent level is 3 House arrest system, wandering, or wrong place
[List of Patents for class 340 subclass 573.5]  573.5           Subclass 573.5 indent level is 3 Incontinence or enuresis alarm
[List of Patents for class 340 subclass 573.6]  573.6           Subclass 573.6 indent level is 3 Water safety alarm
[List of Patents for class 340 subclass 573.7]  573.7           Subclass 573.7 indent level is 3 Posture alarm
[List of Patents for class 340 subclass 577]  577           Subclass 577 indent level is 2 Flame
[List of Patents for class 340 subclass 578]  578           Subclass 578 indent level is 3 By radiant energy
[List of Patents for class 340 subclass 579]  579           Subclass 579 indent level is 3 By ionization or conductivity
[List of Patents for class 340 subclass 580]  580           Subclass 580 indent level is 2 Ice formation
[List of Patents for class 340 subclass 581]  581           Subclass 581 indent level is 3 Thermal
[List of Patents for class 340 subclass 582]  582           Subclass 582 indent level is 3 Vibratory
[List of Patents for class 340 subclass 583]  583           Subclass 583 indent level is 3 Photoelectric
[List of Patents for class 340 subclass 584]  584           Subclass 584 indent level is 2 Thermal
[List of Patents for class 340 subclass 585]  585           Subclass 585 indent level is 3 Refrigerated storage
[List of Patents for class 340 subclass 586]  586           Subclass 586 indent level is 3 Portable
[List of Patents for class 340 subclass 587]  587           Subclass 587 indent level is 3 False alarm resistant
[List of Patents for class 340 subclass 588]  588           Subclass 588 indent level is 3 Time-temperature relationship (e.g., overtemperature exceeds predetermined interval or time-temperature integral)
[List of Patents for class 340 subclass 589]  589           Subclass 589 indent level is 4 Rate of temperature change
[List of Patents for class 340 subclass 590]  590           Subclass 590 indent level is 3 Fusible, frangible, or destructible sensor
[List of Patents for class 340 subclass 591]  591           Subclass 591 indent level is 4 Containing pressurized fluid
[List of Patents for class 340 subclass 592]  592           Subclass 592 indent level is 3 Expanding fluid sensor
[List of Patents for class 340 subclass 593]  593           Subclass 593 indent level is 3 Switch sensor
[List of Patents for class 340 subclass 594]  594           Subclass 594 indent level is 4 With bimetallic element
[List of Patents for class 340 subclass 595]  595           Subclass 595 indent level is 3 Current modifier or generator
[List of Patents for class 340 subclass 596]  596           Subclass 596 indent level is 4 Cable or elongated probe
[List of Patents for class 340 subclass 597]  597           Subclass 597 indent level is 4 Curie point sensor
[List of Patents for class 340 subclass 598]  598           Subclass 598 indent level is 4 Barrier-layer sensor
[List of Patents for class 340 subclass 599]  599           Subclass 599 indent level is 4 Bridge circuit
[List of Patents for class 340 subclass 600]  600           Subclass 600 indent level is 2 Radiant energy
[List of Patents for class 340 subclass 601]  601           Subclass 601 indent level is 2 Meteorological condition
[List of Patents for class 340 subclass 602]  602           Subclass 602 indent level is 3 Moisture or humidity (e.g., rain)
[List of Patents for class 340 subclass 603]  603           Subclass 603 indent level is 2 Fluent material
[List of Patents for class 340 subclass 604]  604           Subclass 604 indent level is 3 Wetness
[List of Patents for class 340 subclass 605]  605           Subclass 605 indent level is 3 Leakage
[List of Patents for class 340 subclass 606]  606           Subclass 606 indent level is 3 Flow rate
[List of Patents for class 340 subclass 607]  607           Subclass 607 indent level is 4 Filter clogging
[List of Patents for class 340 subclass 608]  608           Subclass 608 indent level is 4 Stoppage
[List of Patents for class 340 subclass 609]  609           Subclass 609 indent level is 4 Counting
[List of Patents for class 340 subclass 610]  610           Subclass 610 indent level is 4 Vane in flow path
[List of Patents for class 340 subclass 611]  611           Subclass 611 indent level is 4 Pressure
[List of Patents for class 340 subclass 612]  612           Subclass 612 indent level is 3 Material level
[List of Patents for class 340 subclass 613]  613           Subclass 613 indent level is 4 Weight in container
[List of Patents for class 340 subclass 614]  614           Subclass 614 indent level is 4 Pressure
[List of Patents for class 340 subclass 615]  615           Subclass 615 indent level is 4 Moving sensor (e.g., impeller)
[List of Patents for class 340 subclass 616]  616           Subclass 616 indent level is 4 Overflow
[List of Patents for class 340 subclass 617]  617           Subclass 617 indent level is 4 Pulverant material (e.g., bin)
[List of Patents for class 340 subclass 618]  618           Subclass 618 indent level is 4 Liquid
[List of Patents for class 340 subclass 619]  619           Subclass 619 indent level is 5 Optical sensor
[List of Patents for class 340 subclass 620]  620           Subclass 620 indent level is 5 Electrode probe
[List of Patents for class 340 subclass 621]  621           Subclass 621 indent level is 5 Having sonic sensor
[List of Patents for class 340 subclass 622]  622           Subclass 622 indent level is 5 Having heat sensor
[List of Patents for class 340 subclass 623]  623           Subclass 623 indent level is 5 Float sensor
[List of Patents for class 340 subclass 624]  624           Subclass 624 indent level is 6 Vertically reciprocable
[List of Patents for class 340 subclass 625]  625           Subclass 625 indent level is 6 Pivoted arm
[List of Patents for class 340 subclass 626]  626           Subclass 626 indent level is 3 Pressure
[List of Patents for class 340 subclass 627]  627           Subclass 627 indent level is 3 Particle suspension in fluid
[List of Patents for class 340 subclass 628]  628           Subclass 628 indent level is 4 Smoke
[List of Patents for class 340 subclass 629]  629           Subclass 629 indent level is 5 Ionization
[List of Patents for class 340 subclass 630]  630           Subclass 630 indent level is 5 Photoelectric
[List of Patents for class 340 subclass 631]  631           Subclass 631 indent level is 4 Lubricant
[List of Patents for class 340 subclass 632]  632           Subclass 632 indent level is 3 Gas
[List of Patents for class 340 subclass 633]  633           Subclass 633 indent level is 4 Catalytic detector
[List of Patents for class 340 subclass 634]  634           Subclass 634 indent level is 4 Semiconductor detector
[List of Patents for class 340 subclass 635]  635           Subclass 635 indent level is 2 Condition of electrical apparatus
[List of Patents for class 340 subclass 636.1]  636.1           Subclass 636.1 indent level is 3 Battery
[List of Patents for class 340 subclass 636.11]  636.11           Subclass 636.11 indent level is 4 By change or rate of change of impedance or admittance
[List of Patents for class 340 subclass 636.12]  636.12           Subclass 636.12 indent level is 4 By current and voltage
[List of Patents for class 340 subclass 636.13]  636.13           Subclass 636.13 indent level is 4 By current
[List of Patents for class 340 subclass 636.14]  636.14           Subclass 636.14 indent level is 5 Thermochromic indication
[List of Patents for class 340 subclass 636.15]  636.15           Subclass 636.15 indent level is 4 By voltage
[List of Patents for class 340 subclass 636.16]  636.16           Subclass 636.16 indent level is 4 Having load detail
[List of Patents for class 340 subclass 636.17]  636.17           Subclass 636.17 indent level is 4 Having overcharge detection or protection
[List of Patents for class 340 subclass 636.18]  636.18           Subclass 636.18 indent level is 5 Including temperature detection
[List of Patents for class 340 subclass 636.19]  636.19           Subclass 636.19 indent level is 4 Battery deterioration detection
[List of Patents for class 340 subclass 636.2]  636.2           Subclass 636.2 indent level is 4 Including charging circuit
[List of Patents for class 340 subclass 636.21]  636.21           Subclass 636.21 indent level is 4 Wet cell type
[List of Patents for class 340 subclass 637]  637           Subclass 637 indent level is 3 Watt-hour meter
[List of Patents for class 340 subclass 638]  638           Subclass 638 indent level is 3 Fuse or circuit breaker
[List of Patents for class 340 subclass 639]  639           Subclass 639 indent level is 4 Plural
[List of Patents for class 340 subclass 640]  640           Subclass 640 indent level is 3 Heater element
[List of Patents for class 340 subclass 641]  641           Subclass 641 indent level is 3 Signalling light element
[List of Patents for class 340 subclass 642]  642           Subclass 642 indent level is 4 Plural bulbs or filaments
[List of Patents for class 340 subclass 643]  643           Subclass 643 indent level is 4 Thermal or magnetic current sensors
[List of Patents for class 340 subclass 644]  644           Subclass 644 indent level is 3 Switch or relay
[List of Patents for class 340 subclass 645]  645           Subclass 645 indent level is 3 Rectifier
[List of Patents for class 340 subclass 646]  646           Subclass 646 indent level is 3 Transformer
[List of Patents for class 340 subclass 647]  647           Subclass 647 indent level is 3 Insulation
[List of Patents for class 340 subclass 648]  648           Subclass 648 indent level is 3 Motor
[List of Patents for class 340 subclass 649]  649           Subclass 649 indent level is 3 Condition of intentional grounding circuit
[List of Patents for class 340 subclass 650]  650           Subclass 650 indent level is 3 Undesired circuit ground or short
[List of Patents for class 340 subclass 651]  651           Subclass 651 indent level is 4 For plural circuit conductors
[List of Patents for class 340 subclass 652]  652           Subclass 652 indent level is 3 Breaking of circuit continuity
[List of Patents for class 340 subclass 653]  653           Subclass 653 indent level is 3 Electronic circuit or component
[List of Patents for class 340 subclass 654]  654           Subclass 654 indent level is 3 Circuit energization
[List of Patents for class 340 subclass 655]  655           Subclass 655 indent level is 4 Heating circuit
[List of Patents for class 340 subclass 656]  656           Subclass 656 indent level is 4 Electrical socket
[List of Patents for class 340 subclass 657]  657           Subclass 657 indent level is 2 Electrical characteristic
[List of Patents for class 340 subclass 658]  658           Subclass 658 indent level is 3 Phase or frequency
[List of Patents for class 340 subclass 659]  659           Subclass 659 indent level is 3 Pulse or surge
[List of Patents for class 340 subclass 660]  660           Subclass 660 indent level is 3 Voltage
[List of Patents for class 340 subclass 661]  661           Subclass 661 indent level is 4 Comparison
[List of Patents for class 340 subclass 662]  662           Subclass 662 indent level is 4 Overvoltage
[List of Patents for class 340 subclass 663]  663           Subclass 663 indent level is 4 Undervoltage
[List of Patents for class 340 subclass 664]  664           Subclass 664 indent level is 3 Current
[List of Patents for class 340 subclass 665]  665           Subclass 665 indent level is 2 Force or stress
[List of Patents for class 340 subclass 666]  666           Subclass 666 indent level is 3 Weight
[List of Patents for class 340 subclass 667]  667           Subclass 667 indent level is 4 On seat
[List of Patents for class 340 subclass 668]  668           Subclass 668 indent level is 3 Tension
[List of Patents for class 340 subclass 669]  669           Subclass 669 indent level is 2 Acceleration
[List of Patents for class 340 subclass 670]  670           Subclass 670 indent level is 2 Velocity
[List of Patents for class 340 subclass 671]  671           Subclass 671 indent level is 3 Angular
[List of Patents for class 340 subclass 672]  672           Subclass 672 indent level is 4 Direction of shaft rotation
[List of Patents for class 340 subclass 673]  673           Subclass 673 indent level is 2 Article transport
[List of Patents for class 340 subclass 674]  674           Subclass 674 indent level is 3 Discrete articles
[List of Patents for class 340 subclass 675]  675           Subclass 675 indent level is 3 Web, film, or strip
[List of Patents for class 340 subclass 676]  676           Subclass 676 indent level is 4 Conveyor belt
[List of Patents for class 340 subclass 677]  677           Subclass 677 indent level is 3 Strand
[List of Patents for class 340 subclass 678]  678           Subclass 678 indent level is 2 Of geometrical gauge
[List of Patents for class 340 subclass 679]  679           Subclass 679 indent level is 2 Machine condition
[List of Patents for class 340 subclass 680]  680           Subclass 680 indent level is 3 Machine tool
[List of Patents for class 340 subclass 681]  681           Subclass 681 indent level is 3 Synchronization
[List of Patents for class 340 subclass 682]  682           Subclass 682 indent level is 3 Bearing
[List of Patents for class 340 subclass 683]  683           Subclass 683 indent level is 3 Vibration
[List of Patents for class 340 subclass 684]  684           Subclass 684 indent level is 3 Agricultural
[List of Patents for class 340 subclass 685]  685           Subclass 685 indent level is 3 Cranes
[List of Patents for class 340 subclass 686.1]  686.1           Subclass 686.1 indent level is 2 Position responsive
[List of Patents for class 340 subclass 687]  687           Subclass 687 indent level is 3 Connected or disconnected
[List of Patents for class 340 subclass 688]  688           Subclass 688 indent level is 3 Meter dial
[List of Patents for class 340 subclass 689]  689           Subclass 689 indent level is 3 Tilt
[List of Patents for class 340 subclass 690]  690           Subclass 690 indent level is 3 Geophysical (e.g., fault slip)
[List of Patents for class 340 subclass 686.2]  686.2           Subclass 686.2 indent level is 3 Alignment or misalignment
[List of Patents for class 340 subclass 686.3]  686.3           Subclass 686.3 indent level is 3 Shaft or rotary element
[List of Patents for class 340 subclass 686.4]  686.4           Subclass 686.4 indent level is 3 One article inserted into another
[List of Patents for class 340 subclass 686.5]  686.5           Subclass 686.5 indent level is 3 Workpiece
[List of Patents for class 340 subclass 686.6]  686.6           Subclass 686.6 indent level is 3 Proximity or distance
[List of Patents for class 340 subclass 691.1]  691.1           Subclass 691.1 indent level is 1 Specified indicator structure
[List of Patents for class 340 subclass 691.2]  691.2           Subclass 691.2 indent level is 2 Simulated effect
[List of Patents for class 340 subclass 691.3]  691.3           Subclass 691.3 indent level is 2 Degree or urgency
[List of Patents for class 340 subclass 691.4]  691.4           Subclass 691.4 indent level is 2 Plural
[List of Patents for class 340 subclass 691.5]  691.5           Subclass 691.5 indent level is 3 Diverse
[List of Patents for class 340 subclass 691.6]  691.6           Subclass 691.6 indent level is 2 Information display
[List of Patents for class 340 subclass 692]  692           Subclass 692 indent level is 2 Sound reproducer
[List of Patents for class 340 subclass 691.7]  691.7           Subclass 691.7 indent level is 2 Mechanical
[List of Patents for class 340 subclass 691.8]  691.8           Subclass 691.8 indent level is 2 Control circuit detail
[List of Patents for class 340 subclass 693.1]  693.1           Subclass 693.1 indent level is 1 Specified power supply
[List of Patents for class 340 subclass 693.2]  693.2           Subclass 693.2 indent level is 2 Substitute or emergency source (e.g., back-up battery)
[List of Patents for class 340 subclass 693.3]  693.3           Subclass 693.3 indent level is 2 Having reduced power consumption (e.g., intermittent power)
[List of Patents for class 340 subclass 693.4]  693.4           Subclass 693.4 indent level is 2 Having specified voltage regulator
[List of Patents for class 340 subclass 693.5]  693.5           Subclass 693.5 indent level is 1 Specified housing
[List of Patents for class 340 subclass 693.6]  693.6           Subclass 693.6 indent level is 2 Configured to promote sensing capability (e.g., smoke detector)
[List of Patents for class 340 subclass 693.7]  693.7           Subclass 693.7 indent level is 3 Inserted battery required for housing closure
[List of Patents for class 340 subclass 693.8]  693.8           Subclass 693.8 indent level is 2 Simulation
[List of Patents for class 340 subclass 693.9]  693.9           Subclass 693.9 indent level is 2 Having specified mounting structure
[List of Patents for class 340 subclass 693.11]  693.11           Subclass 693.11 indent level is 3 To wall or ceiling
[List of Patents for class 340 subclass 693.12]  693.12           Subclass 693.12 indent level is 3 Within another housing
[List of Patents for class 340 subclass 825]  825           SELECTIVE
[List of Patents for class 340 subclass 825.01]  825.01           Subclass 825.01 indent level is 1 Spare channel
[List of Patents for class 340 subclass 825.02]  825.02           Subclass 825.02 indent level is 1 Tree or cascade
[List of Patents for class 340 subclass 2.1]  2.1           Subclass 2.1 indent level is 1 Path selection
[List of Patents for class 340 subclass 2.2]  2.2           Subclass 2.2 indent level is 2 Channel selecting matrix
[List of Patents for class 340 subclass 2.21]  2.21           Subclass 2.21 indent level is 3 Plural stages
[List of Patents for class 340 subclass 2.22]  2.22           Subclass 2.22 indent level is 4 Clos type
[List of Patents for class 340 subclass 2.23]  2.23           Subclass 2.23 indent level is 4 Alternate routing
[List of Patents for class 340 subclass 2.24]  2.24           Subclass 2.24 indent level is 4 Having master control element
[List of Patents for class 340 subclass 2.25]  2.25           Subclass 2.25 indent level is 3 Folded
[List of Patents for class 340 subclass 2.26]  2.26           Subclass 2.26 indent level is 3 Having master control element
[List of Patents for class 340 subclass 2.27]  2.27           Subclass 2.27 indent level is 3 Plural matrices
[List of Patents for class 340 subclass 2.28]  2.28           Subclass 2.28 indent level is 3 Crosspoint switch detail (i.e., specific crosspoint)
[List of Patents for class 340 subclass 2.29]  2.29           Subclass 2.29 indent level is 4 Semiconductor
[List of Patents for class 340 subclass 2.31]  2.31           Subclass 2.31 indent level is 4 Gas discharge
[List of Patents for class 340 subclass 2.4]  2.4           Subclass 2.4 indent level is 2 Code or pulse responsive
[List of Patents for class 340 subclass 2.5]  2.5           Subclass 2.5 indent level is 2 Wiper
[List of Patents for class 340 subclass 2.6]  2.6           Subclass 2.6 indent level is 2 Plural stages
[List of Patents for class 340 subclass 2.7]  2.7           Subclass 2.7 indent level is 2 Condition of data channel
[List of Patents for class 340 subclass 2.71]  2.71           Subclass 2.71 indent level is 3 Hunting
[List of Patents for class 340 subclass 2.8]  2.8           Subclass 2.8 indent level is 2 Data channel selector line
[List of Patents for class 340 subclass 3.1]  3.1           Subclass 3.1 indent level is 1 Monitoring in addition to control (e.g., supervisory)
[List of Patents for class 340 subclass 3.2]  3.2           Subclass 3.2 indent level is 2 Synchronization
[List of Patents for class 340 subclass 3.21]  3.21           Subclass 3.21 indent level is 3 Time slot or packet
[List of Patents for class 340 subclass 3.22]  3.22           Subclass 3.22 indent level is 3 Electromechanical (e.g., relay, rotary distributor)
[List of Patents for class 340 subclass 3.23]  3.23           Subclass 3.23 indent level is 4 Relay chain
[List of Patents for class 340 subclass 3.24]  3.24           Subclass 3.24 indent level is 4 Step-by-step
[List of Patents for class 340 subclass 3.3]  3.3           Subclass 3.3 indent level is 2 Including storage or recording
[List of Patents for class 340 subclass 3.31]  3.31           Subclass 3.31 indent level is 3 Storage at controlled device or sensor
[List of Patents for class 340 subclass 3.32]  3.32           Subclass 3.32 indent level is 3 Storage at controller
[List of Patents for class 340 subclass 3.4]  3.4           Subclass 3.4 indent level is 2 Quiescent
[List of Patents for class 340 subclass 3.41]  3.41           Subclass 3.41 indent level is 3 Collision avoidance
[List of Patents for class 340 subclass 3.42]  3.42           Subclass 3.42 indent level is 2 Control to avoid fault
[List of Patents for class 340 subclass 3.43]  3.43           Subclass 3.43 indent level is 2 Fault condition detection
[List of Patents for class 340 subclass 3.44]  3.44           Subclass 3.44 indent level is 3 Control to correct fault
[List of Patents for class 340 subclass 3.5]  3.5           Subclass 3.5 indent level is 2 Including addressing
[List of Patents for class 340 subclass 3.51]  3.51           Subclass 3.51 indent level is 3 Polling or roll call
[List of Patents for class 340 subclass 3.52]  3.52           Subclass 3.52 indent level is 3 Group address
[List of Patents for class 340 subclass 3.53]  3.53           Subclass 3.53 indent level is 3 Source address
[List of Patents for class 340 subclass 3.54]  3.54           Subclass 3.54 indent level is 3 Destination address
[List of Patents for class 340 subclass 3.55]  3.55           Subclass 3.55 indent level is 4 Pulse counting
[List of Patents for class 340 subclass 3.6]  3.6           Subclass 3.6 indent level is 2 Scanning
[List of Patents for class 340 subclass 3.61]  3.61           Subclass 3.61 indent level is 3 Continuous
[List of Patents for class 340 subclass 3.62]  3.62           Subclass 3.62 indent level is 3 Interrupted
[List of Patents for class 340 subclass 3.63]  3.63           Subclass 3.63 indent level is 4 Automatic
[List of Patents for class 340 subclass 3.7]  3.7           Subclass 3.7 indent level is 2 Including indicator
[List of Patents for class 340 subclass 3.71]  3.71           Subclass 3.71 indent level is 3 Having manual control input
[List of Patents for class 340 subclass 3.8]  3.8           Subclass 3.8 indent level is 2 Electromechanical relay
[List of Patents for class 340 subclass 3.9]  3.9           Subclass 3.9 indent level is 2 Control then monitoring
[List of Patents for class 340 subclass 825.19]  825.19           Subclass 825.19 indent level is 1 Communication or control for the handicapped
[List of Patents for class 340 subclass 825.2]  825.2           Subclass 825.2 indent level is 1 Synchronizing
[List of Patents for class 340 subclass 825.21]  825.21           Subclass 825.21 indent level is 2 With addressing
[List of Patents for class 340 subclass 825.22]  825.22           Subclass 825.22 indent level is 1 Program control
[List of Patents for class 340 subclass 825.23]  825.23           Subclass 825.23 indent level is 2 Machine tool
[List of Patents for class 340 subclass 825.24]  825.24           Subclass 825.24 indent level is 2 Of audio system
[List of Patents for class 340 subclass 825.25]  825.25           Subclass 825.25 indent level is 1 Audio system (e.g., by pulse signal)
[List of Patents for class 340 subclass 825.26]  825.26           Subclass 825.26 indent level is 1 Stock quotation
[List of Patents for class 340 subclass 825.27]  825.27           Subclass 825.27 indent level is 2 With information storage
[List of Patents for class 340 subclass 825.28]  825.28           Subclass 825.28 indent level is 1 Space allocation (e.g., vehicle seat, hotel reservation)
[List of Patents for class 340 subclass 825.29]  825.29           Subclass 825.29 indent level is 2 Remote terminal
[List of Patents for class 340 subclass 5.1]  5.1           Subclass 5.1 indent level is 1 Intelligence comparison for controlling
[List of Patents for class 340 subclass 5.2]  5.2           Subclass 5.2 indent level is 2 Authorization control (e.g., entry into an area)
[List of Patents for class 340 subclass 5.21]  5.21           Subclass 5.21 indent level is 3 Varying authorization
[List of Patents for class 340 subclass 5.22]  5.22           Subclass 5.22 indent level is 4 Code programming
[List of Patents for class 340 subclass 5.23]  5.23           Subclass 5.23 indent level is 5 Programming from coded record to controller
[List of Patents for class 340 subclass 5.24]  5.24           Subclass 5.24 indent level is 6 Using additional record or carrier code
[List of Patents for class 340 subclass 5.25]  5.25           Subclass 5.25 indent level is 5 Programming of coded record
[List of Patents for class 340 subclass 5.26]  5.26           Subclass 5.26 indent level is 4 Code rotating or scrambling
[List of Patents for class 340 subclass 5.27]  5.27           Subclass 5.27 indent level is 4 Rule based input
[List of Patents for class 340 subclass 5.28]  5.28           Subclass 5.28 indent level is 3 Timed access blocking
[List of Patents for class 340 subclass 5.3]  5.3           Subclass 5.3 indent level is 3 Having indication of improper access
[List of Patents for class 340 subclass 5.31]  5.31           Subclass 5.31 indent level is 4 Lockout or disable
[List of Patents for class 340 subclass 5.32]  5.32           Subclass 5.32 indent level is 4 Visual indication
[List of Patents for class 340 subclass 5.33]  5.33           Subclass 5.33 indent level is 4 Including link to remote indicator
[List of Patents for class 340 subclass 5.4]  5.4           Subclass 5.4 indent level is 3 Credit
[List of Patents for class 340 subclass 5.41]  5.41           Subclass 5.41 indent level is 4 Banking or finance
[List of Patents for class 340 subclass 5.42]  5.42           Subclass 5.42 indent level is 4 Debiting (e.g., rental)
[List of Patents for class 340 subclass 5.5]  5.5           Subclass 5.5 indent level is 3 Input from central location for plural controlled devices
[List of Patents for class 340 subclass 5.51]  5.51           Subclass 5.51 indent level is 3 Manual code input
[List of Patents for class 340 subclass 5.52]  5.52           Subclass 5.52 indent level is 4 Biometrics
[List of Patents for class 340 subclass 5.53]  5.53           Subclass 5.53 indent level is 5 Image (e.g., fingerprint, face)
[List of Patents for class 340 subclass 5.54]  5.54           Subclass 5.54 indent level is 4 Password
[List of Patents for class 340 subclass 5.55]  5.55           Subclass 5.55 indent level is 4 Rotary input
[List of Patents for class 340 subclass 5.6]  5.6           Subclass 5.6 indent level is 3 Coded record input (e.g., IC card or key)
[List of Patents for class 340 subclass 5.61]  5.61           Subclass 5.61 indent level is 4 Wireless transceiver
[List of Patents for class 340 subclass 5.62]  5.62           Subclass 5.62 indent level is 5 Including manual switching means
[List of Patents for class 340 subclass 5.63]  5.63           Subclass 5.63 indent level is 5 Including timing means (e.g., clock)
[List of Patents for class 340 subclass 5.64]  5.64           Subclass 5.64 indent level is 4 Wireless transmitter
[List of Patents for class 340 subclass 5.65]  5.65           Subclass 5.65 indent level is 4 Electronic coded record
[List of Patents for class 340 subclass 5.66]  5.66           Subclass 5.66 indent level is 4 Magnetic coded record
[List of Patents for class 340 subclass 5.67]  5.67           Subclass 5.67 indent level is 4 Mechanical coded record
[List of Patents for class 340 subclass 5.7]  5.7           Subclass 5.7 indent level is 3 Access barrier
[List of Patents for class 340 subclass 5.71]  5.71           Subclass 5.71 indent level is 4 Garage door
[List of Patents for class 340 subclass 5.72]  5.72           Subclass 5.72 indent level is 4 Vehicle door
[List of Patents for class 340 subclass 5.73]  5.73           Subclass 5.73 indent level is 4 Lockbox
[List of Patents for class 340 subclass 5.74]  5.74           Subclass 5.74 indent level is 3 Access to electrical information
[List of Patents for class 340 subclass 5.8]  5.8           Subclass 5.8 indent level is 2 Authentication (e.g., identity)
[List of Patents for class 340 subclass 5.81]  5.81           Subclass 5.81 indent level is 3 Personal identification
[List of Patents for class 340 subclass 5.82]  5.82           Subclass 5.82 indent level is 4 Biometrics
[List of Patents for class 340 subclass 5.83]  5.83           Subclass 5.83 indent level is 5 Image (Fingerprint, Face)
[List of Patents for class 340 subclass 5.84]  5.84           Subclass 5.84 indent level is 5 Voice
[List of Patents for class 340 subclass 5.85]  5.85           Subclass 5.85 indent level is 4 Password
[List of Patents for class 340 subclass 5.86]  5.86           Subclass 5.86 indent level is 3 Document authentication
[List of Patents for class 340 subclass 5.9]  5.9           Subclass 5.9 indent level is 2 Commodity (e.g., vending)
[List of Patents for class 340 subclass 5.91]  5.91           Subclass 5.91 indent level is 3 Including merchandise information display system (e.g., store price display)
[List of Patents for class 340 subclass 5.92]  5.92           Subclass 5.92 indent level is 3 Item inventorying
[List of Patents for class 340 subclass 825.36]  825.36           Subclass 825.36 indent level is 1 Having indication or alarm (e.g., location indication)
[List of Patents for class 340 subclass 825.37]  825.37           Subclass 825.37 indent level is 2 Additional to other selective control
[List of Patents for class 340 subclass 825.38]  825.38           Subclass 825.38 indent level is 2 Party line
[List of Patents for class 340 subclass 825.39]  825.39           Subclass 825.39 indent level is 3 Selection by means of frequency
[List of Patents for class 340 subclass 825.4]  825.4           Subclass 825.4 indent level is 3 Selector or indicator, per se
[List of Patents for class 340 subclass 825.41]  825.41           Subclass 825.41 indent level is 3 Step-by-step impulse
[List of Patents for class 340 subclass 825.42]  825.42           Subclass 825.42 indent level is 4 Polarity controlled
[List of Patents for class 340 subclass 825.43]  825.43           Subclass 825.43 indent level is 3 Amplitude or polarity controlled
[List of Patents for class 340 subclass 7.1]  7.1           Subclass 7.1 indent level is 2 Paging to control diverse device
[List of Patents for class 340 subclass 7.2]  7.2           Subclass 7.2 indent level is 2 Code responsive (i.e., paging)
[List of Patents for class 340 subclass 7.21]  7.21           Subclass 7.21 indent level is 3 Two-way paging
[List of Patents for class 340 subclass 7.22]  7.22           Subclass 7.22 indent level is 4 Acknowledgment of message receipt
[List of Patents for class 340 subclass 7.23]  7.23           Subclass 7.23 indent level is 5 Including reply to query
[List of Patents for class 340 subclass 7.24]  7.24           Subclass 7.24 indent level is 3 Transmitting configuration
[List of Patents for class 340 subclass 7.25]  7.25           Subclass 7.25 indent level is 4 Multiple transmitters
[List of Patents for class 340 subclass 7.26]  7.26           Subclass 7.26 indent level is 5 Simulcast
[List of Patents for class 340 subclass 7.27]  7.27           Subclass 7.27 indent level is 5 Zoned
[List of Patents for class 340 subclass 7.28]  7.28           Subclass 7.28 indent level is 3 Paging terminal (i.e., element prior to the transmitter)
[List of Patents for class 340 subclass 7.29]  7.29           Subclass 7.29 indent level is 4 Terminal connected to other network (e.g., Internet)
[List of Patents for class 340 subclass 7.3]  7.3           Subclass 7.3 indent level is 4 Queuing
[List of Patents for class 340 subclass 7.31]  7.31           Subclass 7.31 indent level is 4 Message input
[List of Patents for class 340 subclass 7.32]  7.32           Subclass 7.32 indent level is 3 Power control or battery saving
[List of Patents for class 340 subclass 7.33]  7.33           Subclass 7.33 indent level is 4 Based on received signal
[List of Patents for class 340 subclass 7.34]  7.34           Subclass 7.34 indent level is 5 Frame based timing
[List of Patents for class 340 subclass 7.35]  7.35           Subclass 7.35 indent level is 5 Address based
[List of Patents for class 340 subclass 7.36]  7.36           Subclass 7.36 indent level is 5 Received signal includes power command
[List of Patents for class 340 subclass 7.37]  7.37           Subclass 7.37 indent level is 4 Control based upon available power
[List of Patents for class 340 subclass 7.38]  7.38           Subclass 7.38 indent level is 4 Time based
[List of Patents for class 340 subclass 7.39]  7.39           Subclass 7.39 indent level is 3 Programming the receiver
[List of Patents for class 340 subclass 7.4]  7.4           Subclass 7.4 indent level is 4 Via local device
[List of Patents for class 340 subclass 7.41]  7.41           Subclass 7.41 indent level is 4 Over the air
[List of Patents for class 340 subclass 7.42]  7.42           Subclass 7.42 indent level is 3 Frequency scanning for address
[List of Patents for class 340 subclass 7.43]  7.43           Subclass 7.43 indent level is 3 Particular message and address format (e.g., POCSAG, FLEX, etc.)
[List of Patents for class 340 subclass 7.44]  7.44           Subclass 7.44 indent level is 4 Having error detection or correction
[List of Patents for class 340 subclass 7.45]  7.45           Subclass 7.45 indent level is 3 Addressing format
[List of Patents for class 340 subclass 7.46]  7.46           Subclass 7.46 indent level is 4 Group call
[List of Patents for class 340 subclass 7.47]  7.47           Subclass 7.47 indent level is 5 Source address
[List of Patents for class 340 subclass 7.48]  7.48           Subclass 7.48 indent level is 5 News information provider (e.g., sports, weather, etc.)
[List of Patents for class 340 subclass 7.49]  7.49           Subclass 7.49 indent level is 4 Tone code (i.e., frequency code)
[List of Patents for class 340 subclass 7.5]  7.5           Subclass 7.5 indent level is 3 Distress signal
[List of Patents for class 340 subclass 7.51]  7.51           Subclass 7.51 indent level is 3 Message presentation
[List of Patents for class 340 subclass 7.52]  7.52           Subclass 7.52 indent level is 4 Storing or retrieving message (e.g., received message database handling)
[List of Patents for class 340 subclass 7.53]  7.53           Subclass 7.53 indent level is 4 Canned message (audible or visual)
[List of Patents for class 340 subclass 7.54]  7.54           Subclass 7.54 indent level is 4 Via externally coupled device
[List of Patents for class 340 subclass 7.55]  7.55           Subclass 7.55 indent level is 4 Display
[List of Patents for class 340 subclass 7.56]  7.56           Subclass 7.56 indent level is 5 Including graphics
[List of Patents for class 340 subclass 7.57]  7.57           Subclass 7.57 indent level is 4 Audible
[List of Patents for class 340 subclass 7.58]  7.58           Subclass 7.58 indent level is 3 Alert
[List of Patents for class 340 subclass 7.59]  7.59           Subclass 7.59 indent level is 4 Priority alert
[List of Patents for class 340 subclass 7.6]  7.6           Subclass 7.6 indent level is 4 Vibratory (i.e., tactual) alarm
[List of Patents for class 340 subclass 7.61]  7.61           Subclass 7.61 indent level is 4 Visual
[List of Patents for class 340 subclass 7.62]  7.62           Subclass 7.62 indent level is 4 Audible
[List of Patents for class 340 subclass 7.63]  7.63           Subclass 7.63 indent level is 3 Housing detail
[List of Patents for class 340 subclass 825.49]  825.49           Subclass 825.49 indent level is 2 Location indication
[List of Patents for class 340 subclass 825.5]  825.5           Subclass 825.5 indent level is 1 Lockout or priority (programmed or variable)
[List of Patents for class 340 subclass 825.51]  825.51           Subclass 825.51 indent level is 2 Designated priority
[List of Patents for class 340 subclass 825.52]  825.52           Subclass 825.52 indent level is 1 Addressing
[List of Patents for class 340 subclass 825.53]  825.53           Subclass 825.53 indent level is 2 Plural part (e.g., digit) or repetitions
[List of Patents for class 340 subclass 10.1]  10.1           Subclass 10.1 indent level is 1 Interrogation response
[List of Patents for class 340 subclass 10.2]  10.2           Subclass 10.2 indent level is 2 Contention avoidance
[List of Patents for class 340 subclass 10.3]  10.3           Subclass 10.3 indent level is 2 Interrogation signal detail
[List of Patents for class 340 subclass 10.31]  10.31           Subclass 10.31 indent level is 3 Individual call
[List of Patents for class 340 subclass 10.32]  10.32           Subclass 10.32 indent level is 3 Group call
[List of Patents for class 340 subclass 10.33]  10.33           Subclass 10.33 indent level is 3 Wake up (all call)
[List of Patents for class 340 subclass 10.34]  10.34           Subclass 10.34 indent level is 3 Power up
[List of Patents for class 340 subclass 10.4]  10.4           Subclass 10.4 indent level is 2 Response signal detail
[List of Patents for class 340 subclass 10.41]  10.41           Subclass 10.41 indent level is 3 Combination response
[List of Patents for class 340 subclass 10.42]  10.42           Subclass 10.42 indent level is 3 Identification only
[List of Patents for class 340 subclass 10.5]  10.5           Subclass 10.5 indent level is 2 Additional control
[List of Patents for class 340 subclass 10.51]  10.51           Subclass 10.51 indent level is 3 Programming (e.g., read/write)
[List of Patents for class 340 subclass 10.52]  10.52           Subclass 10.52 indent level is 4 ID code
[List of Patents for class 340 subclass 10.6]  10.6           Subclass 10.6 indent level is 2 Printout or display
[List of Patents for class 340 subclass 825.56]  825.56           Subclass 825.56 indent level is 1 With multidigit encoder
[List of Patents for class 340 subclass 825.57]  825.57           Subclass 825.57 indent level is 1 Pulse responsive actuation
[List of Patents for class 340 subclass 825.58]  825.58           Subclass 825.58 indent level is 2 Phase or frequency shift keying
[List of Patents for class 340 subclass 825.59]  825.59           Subclass 825.59 indent level is 2 Polarity
[List of Patents for class 340 subclass 825.6]  825.6           Subclass 825.6 indent level is 2 Pulse pairs
[List of Patents for class 340 subclass 825.61]  825.61           Subclass 825.61 indent level is 2 Having delay line
[List of Patents for class 340 subclass 825.62]  825.62           Subclass 825.62 indent level is 2 Serial
[List of Patents for class 340 subclass 825.63]  825.63           Subclass 825.63 indent level is 3 Pulse width
[List of Patents for class 340 subclass 825.64]  825.64           Subclass 825.64 indent level is 3 Pulse spacing (e.g., pulse repetition rate)
[List of Patents for class 340 subclass 825.65]  825.65           Subclass 825.65 indent level is 3 Counting
[List of Patents for class 340 subclass 825.66]  825.66           Subclass 825.66 indent level is 4 Relay
[List of Patents for class 340 subclass 825.67]  825.67           Subclass 825.67 indent level is 4 Counting chain
[List of Patents for class 340 subclass 825.68]  825.68           Subclass 825.68 indent level is 3 Shift register
[List of Patents for class 340 subclass 825.69]  825.69           Subclass 825.69 indent level is 3 Radio link
[List of Patents for class 340 subclass 825.7]  825.7           Subclass 825.7 indent level is 1 Phase responsive actuation
[List of Patents for class 340 subclass 825.71]  825.71           Subclass 825.71 indent level is 1 Frequency responsive actuation
[List of Patents for class 340 subclass 825.72]  825.72           Subclass 825.72 indent level is 2 Wireless link
[List of Patents for class 340 subclass 825.73]  825.73           Subclass 825.73 indent level is 2 Plural frequencies
[List of Patents for class 340 subclass 825.74]  825.74           Subclass 825.74 indent level is 3 Simultaneous
[List of Patents for class 340 subclass 825.75]  825.75           Subclass 825.75 indent level is 3 Permutation
[List of Patents for class 340 subclass 825.76]  825.76           Subclass 825.76 indent level is 3 Corresponding to distinct functions
[List of Patents for class 340 subclass 825.77]  825.77           Subclass 825.77 indent level is 1 Amplitude responsive actuation
[List of Patents for class 340 subclass 825.78]  825.78           Subclass 825.78 indent level is 2 Divided resistor
[List of Patents for class 340 subclass 14.1]  14.1           Subclass 14.1 indent level is 1 Decoder matrix
[List of Patents for class 340 subclass 14.2]  14.2           Subclass 14.2 indent level is 2 Plural stage
[List of Patents for class 340 subclass 14.3]  14.3           Subclass 14.3 indent level is 2 Programmable
[List of Patents for class 340 subclass 14.31]  14.31           Subclass 14.31 indent level is 3 Having fusible element
[List of Patents for class 340 subclass 14.4]  14.4           Subclass 14.4 indent level is 2 Logic crosspoint
[List of Patents for class 340 subclass 14.5]  14.5           Subclass 14.5 indent level is 2 Bistable crosspoint
[List of Patents for class 340 subclass 14.6]  14.6           Subclass 14.6 indent level is 2 Semiconductor crosspoint
[List of Patents for class 340 subclass 14.61]  14.61           Subclass 14.61 indent level is 3 Integrated circuit
[List of Patents for class 340 subclass 14.62]  14.62           Subclass 14.62 indent level is 3 Transistor
[List of Patents for class 340 subclass 14.63]  14.63           Subclass 14.63 indent level is 4 Field effect transistor
[List of Patents for class 340 subclass 14.64]  14.64           Subclass 14.64 indent level is 4 Four or more electrode type
[List of Patents for class 340 subclass 14.65]  14.65           Subclass 14.65 indent level is 4 Plural transistors in element
[List of Patents for class 340 subclass 14.66]  14.66           Subclass 14.66 indent level is 3 Semiconductor diode
[List of Patents for class 340 subclass 14.67]  14.67           Subclass 14.67 indent level is 4 Charge storage
[List of Patents for class 340 subclass 14.68]  14.68           Subclass 14.68 indent level is 4 Plural diodes at crosspoint
[List of Patents for class 340 subclass 14.69]  14.69           Subclass 14.69 indent level is 3 Switching element
[List of Patents for class 340 subclass 825.97]  825.97           Subclass 825.97 indent level is 1 Having electron beam device
[List of Patents for class 340 subclass 825.98]  825.98           Subclass 825.98 indent level is 1 System having rectifier
[List of Patents for class 340 subclass 286.01]  286.01           SYSTEMS
[List of Patents for class 340 subclass 286.02]  286.02           Subclass 286.02 indent level is 1 Network signaling
[List of Patents for class 340 subclass 286.03]  286.03           Subclass 286.03 indent level is 2 Speaking tube including circuit
[List of Patents for class 340 subclass 286.04]  286.04           Subclass 286.04 indent level is 1 Manual alarm telegraph; e.g., other than signal box type
[List of Patents for class 340 subclass 286.05]  286.05           Subclass 286.05 indent level is 2 Fire
[List of Patents for class 340 subclass 286.06]  286.06           Subclass 286.06 indent level is 1 Call station
[List of Patents for class 340 subclass 286.07]  286.07           Subclass 286.07 indent level is 2 Hospital
[List of Patents for class 340 subclass 286.08]  286.08           Subclass 286.08 indent level is 2 Hotel
[List of Patents for class 340 subclass 286.09]  286.09           Subclass 286.09 indent level is 2 Restaurant
[List of Patents for class 340 subclass 286.11]  286.11           Subclass 286.11 indent level is 1 Annunciator
[List of Patents for class 340 subclass 286.12]  286.12           Subclass 286.12 indent level is 2 Drop annunciator
[List of Patents for class 340 subclass 286.13]  286.13           Subclass 286.13 indent level is 1 Mimic
[List of Patents for class 340 subclass 286.14]  286.14           Subclass 286.14 indent level is 2 Mapping
[List of Patents for class 340 subclass 287]  287           Subclass 287 indent level is 1 Signal box type (e.g., to call messenger, plural fire alarm boxes)
[List of Patents for class 340 subclass 288]  288           Subclass 288 indent level is 2 Combined (e.g., alarm circuit over power line)
[List of Patents for class 340 subclass 289]  289           Subclass 289 indent level is 3 With fire extinguisher (e.g., CO2)
[List of Patents for class 340 subclass 290]  290           Subclass 290 indent level is 3 Engine house apparatus controlling (e.g., releases horses, starts motor)
[List of Patents for class 340 subclass 291]  291           Subclass 291 indent level is 2 Repeaters (e.g., from central to plural fire houses or to siren)
[List of Patents for class 340 subclass 292]  292           Subclass 292 indent level is 2 Circuit maintenance (e.g., fault alarm, faulty circuit substitution)
[List of Patents for class 340 subclass 293]  293           Subclass 293 indent level is 2 Variable signal (e.g., police and fire, first and third alarm)
[List of Patents for class 340 subclass 294]  294           Subclass 294 indent level is 3 Dial selector for variable signal
[List of Patents for class 340 subclass 295]  295           Subclass 295 indent level is 2 Noninterfering (prevents break-in by another box during transmission)
[List of Patents for class 340 subclass 296]  296           Subclass 296 indent level is 3 Key obstruction type
[List of Patents for class 340 subclass 297]  297           Subclass 297 indent level is 2 With signal at box (e.g., preliminary signal to combat false alarms)
[List of Patents for class 340 subclass 298]  298           Subclass 298 indent level is 3 Answer back signal acknowledges transmitted signal
[List of Patents for class 340 subclass 299]  299           Subclass 299 indent level is 3 Simultaneous (e.g., actuated by transmitted signal)
[List of Patents for class 340 subclass 300]  300           Subclass 300 indent level is 3 Lamp at box (e.g., to call patrolman)
[List of Patents for class 340 subclass 301]  301           Subclass 301 indent level is 2 Portable box actuating key (e.g., key must be released by signal from central)
[List of Patents for class 340 subclass 302]  302           Subclass 302 indent level is 3 Frangible guard or protector for key
[List of Patents for class 340 subclass 303]  303           Subclass 303 indent level is 2 Frangible element must be broken to send signal
[List of Patents for class 340 subclass 304]  304           Subclass 304 indent level is 2 False alarm combating (e.g., detention devices)
[List of Patents for class 340 subclass 305]  305           Subclass 305 indent level is 2 Local circuit to actuate box
[List of Patents for class 340 subclass 306]  306           Subclass 306 indent level is 3 Watchman's local circuit
[List of Patents for class 340 subclass 307]  307           Subclass 307 indent level is 2 Transmitters
[List of Patents for class 340 subclass 308]  308           Subclass 308 indent level is 3 Controlled by door of signal box
[List of Patents for class 340 subclass 309]  309           Subclass 309 indent level is 3 With make and break wheel
[List of Patents for class 340 subclass 309.16]  309.16           Subclass 309.16 indent level is 1 Timer control
[List of Patents for class 340 subclass 309.2]  309.2           Subclass 309.2 indent level is 2 With nonelectrical indicator or exhibitor
[List of Patents for class 340 subclass 309.3]  309.3           Subclass 309.3 indent level is 2 With diversely controlled indicator
[List of Patents for class 340 subclass 309.4]  309.4           Subclass 309.4 indent level is 2 Selectively or sequentially actuated indicators
[List of Patents for class 340 subclass 309.5]  309.5           Subclass 309.5 indent level is 3 With independent manual controller
[List of Patents for class 340 subclass 309.6]  309.6           Subclass 309.6 indent level is 2 Circuit maker-breaker in series
[List of Patents for class 340 subclass 309.7]  309.7           Subclass 309.7 indent level is 2 Reminder device with built-in timer
[List of Patents for class 340 subclass 309.8]  309.8           Subclass 309.8 indent level is 2 Separate diverse device activated by timer
[List of Patents for class 340 subclass 309.9]  309.9           Subclass 309.9 indent level is 2 Separate diverse device deactivated by timer
[List of Patents for class 340 subclass 310.01]  310.01           Subclass 310.01 indent level is 1 Signal over power line
[List of Patents for class 340 subclass 310.02]  310.02           Subclass 310.02 indent level is 2 Modulation technique
[List of Patents for class 340 subclass 310.03]  310.03           Subclass 310.03 indent level is 2 Noise reduction (e.g., filtering)
[List of Patents for class 340 subclass 310.04]  310.04           Subclass 310.04 indent level is 3 Zero crossing
[List of Patents for class 340 subclass 310.05]  310.05           Subclass 310.05 indent level is 2 Impedance matching (e.g., Y-match or delta match)
[List of Patents for class 340 subclass 310.06]  310.06           Subclass 310.06 indent level is 2 Bidirectional (e.g., with transceiver)
[List of Patents for class 340 subclass 310.07]  310.07           Subclass 310.07 indent level is 2 With inductive coupling (e.g., transformer or torroid)
[List of Patents for class 340 subclass 310.08]  310.08           Subclass 310.08 indent level is 2 With coupling plug
[List of Patents for class 340 subclass 311.2]  311.2           Subclass 311.2 indent level is 1 Nonselective paging (e.g., public address system)
[List of Patents for class 340 subclass 313]  313           Subclass 313 indent level is 1 Answer back
[List of Patents for class 340 subclass 314]  314           Subclass 314 indent level is 2 Noncorrespondence alarm (e.g., if acknowledgement is incorrect)
[List of Patents for class 340 subclass 315]  315           Subclass 315 indent level is 1 Selsyn type
[List of Patents for class 340 subclass 316]  316           Subclass 316 indent level is 1 Rebalancing at receiver
[List of Patents for class 340 subclass 317]  317           Subclass 317 indent level is 2 Automatic rebalancing
[List of Patents for class 340 subclass 318]  318           Subclass 318 indent level is 1 Synchronous distributor at transmitter and receiver
[List of Patents for class 340 subclass 319]  319           Subclass 319 indent level is 1 Plural electromagnets or plural motors receiver
[List of Patents for class 340 subclass 320]  320           Subclass 320 indent level is 1 Via fluid conduit (e.g., fire hose)
[List of Patents for class 340 subclass 321]  321           Subclass 321 indent level is 1 Portable self-contained (e.g., movie usher's signalling flashlight)
[List of Patents for class 340 subclass 322]  322           Subclass 322 indent level is 1 Self-cancelling after fixed time
[List of Patents for class 340 subclass 323R]  323R           Subclass 323R indent level is 1 Game reporting
[List of Patents for class 340 subclass 323B]  323B           Subclass 323B indent level is 2 Bowling
[List of Patents for class 340 subclass 326]  326           Subclass 326 indent level is 1 Plural (e.g., concurrent auxiliary) single indications (e.g., light flashes when bell rings)
[List of Patents for class 340 subclass 327]  327           Subclass 327 indent level is 2 With sounder signal cut-off
[List of Patents for class 340 subclass 328]  328           Subclass 328 indent level is 1 Audible signals (e.g., bell rings softly first and then loudly)
[List of Patents for class 340 subclass 329]  329           Subclass 329 indent level is 2 Intermittent
[List of Patents for class 340 subclass 330]  330           Subclass 330 indent level is 1 In and out indicators (e.g., doorbell button flashes "out" sign)
[List of Patents for class 340 subclass 331]  331           Subclass 331 indent level is 1 Periodic or flashing
[List of Patents for class 340 subclass 332]  332           Subclass 332 indent level is 1 Signal light systems
[List of Patents for class 340 subclass 333]  333           Subclass 333 indent level is 1 With specific power supply (e.g., power substitution)
[List of Patents for class 340 subclass 425.1]  425.1           REPEATER IN UNSPECIFIED TYPE COMMUNICATIONS LINE OR CHANNEL (E.G., RELAY STATION)
[List of Patents for class 340 subclass 425.2]  425.2           Subclass 425.2 indent level is 1 Power control
[List of Patents for class 340 subclass 407.1]  407.1           TACTUAL INDICATION
[List of Patents for class 340 subclass 407.2]  407.2           Subclass 407.2 indent level is 1 With input means (e.g., keyboard)
[List of Patents for class 340 subclass 815.4]  815.4           VISUAL INDICATION
[List of Patents for class 340 subclass 815.41]  815.41           Subclass 815.41 indent level is 1 False signal prevention (anti-sunlight)
[List of Patents for class 340 subclass 815.42]  815.42           Subclass 815.42 indent level is 1 Having light piping
[List of Patents for class 340 subclass 815.43]  815.43           Subclass 815.43 indent level is 2 With specified colors
[List of Patents for class 340 subclass 815.44]  815.44           Subclass 815.44 indent level is 1 Seven-segment indicator
[List of Patents for class 340 subclass 815.45]  815.45           Subclass 815.45 indent level is 1 Using light emitting diodes
[List of Patents for class 340 subclass 815.46]  815.46           Subclass 815.46 indent level is 1 Audio responsive lamp
[List of Patents for class 340 subclass 815.47]  815.47           Subclass 815.47 indent level is 1 Switchboard or panel type (e.g., bullseye)
[List of Patents for class 340 subclass 815.48]  815.48           Subclass 815.48 indent level is 2 Pushbutton
[List of Patents for class 340 subclass 815.49]  815.49           Subclass 815.49 indent level is 2 Housing
[List of Patents for class 340 subclass 815.5]  815.5           Subclass 815.5 indent level is 3 Including optical means
[List of Patents for class 340 subclass 815.51]  815.51           Subclass 815.51 indent level is 3 Including spring
[List of Patents for class 340 subclass 815.52]  815.52           Subclass 815.52 indent level is 2 With details of energizing circuit
[List of Patents for class 340 subclass 815.53]  815.53           Subclass 815.53 indent level is 1 Lighted alphanumeric or character indicator matrix
[List of Patents for class 340 subclass 815.54]  815.54           Subclass 815.54 indent level is 2 Having optical means in viewing path
[List of Patents for class 340 subclass 815.55]  815.55           Subclass 815.55 indent level is 1 Transparent or translucent indicator with means for blocking light
[List of Patents for class 340 subclass 815.56]  815.56           Subclass 815.56 indent level is 2 Color
[List of Patents for class 340 subclass 815.57]  815.57           Subclass 815.57 indent level is 2 Having optical device
[List of Patents for class 340 subclass 815.58]  815.58           Subclass 815.58 indent level is 1 Step by step positioner
[List of Patents for class 340 subclass 815.59]  815.59           Subclass 815.59 indent level is 2 Having resetting device
[List of Patents for class 340 subclass 815.6]  815.6           Subclass 815.6 indent level is 2 Remote controller
[List of Patents for class 340 subclass 815.61]  815.61           Subclass 815.61 indent level is 2 Drum indicator
[List of Patents for class 340 subclass 815.62]  815.62           Subclass 815.62 indent level is 1 Electromagnetic actuator for indicator matrix
[List of Patents for class 340 subclass 815.63]  815.63           Subclass 815.63 indent level is 1 Binary indicator
[List of Patents for class 340 subclass 815.64]  815.64           Subclass 815.64 indent level is 1 Electromagnetic rotator for indicator wheel
[List of Patents for class 340 subclass 815.65]  815.65           Subclass 815.65 indent level is 1 Multiple colors
[List of Patents for class 340 subclass 815.66]  815.66           Subclass 815.66 indent level is 2 By light signal
[List of Patents for class 340 subclass 815.67]  815.67           Subclass 815.67 indent level is 3 Plural
[List of Patents for class 340 subclass 815.68]  815.68           Subclass 815.68 indent level is 3 With movable optical means
[List of Patents for class 340 subclass 815.69]  815.69           Subclass 815.69 indent level is 1 Diverse indications
[List of Patents for class 340 subclass 815.7]  815.7           Subclass 815.7 indent level is 2 Having percussion type indication (e.g., electric bells, chimes)
[List of Patents for class 340 subclass 815.71]  815.71           Subclass 815.71 indent level is 3 Electromagnetic
[List of Patents for class 340 subclass 815.72]  815.72           Subclass 815.72 indent level is 2 Having pneumatic type indication
[List of Patents for class 340 subclass 815.73]  815.73           Subclass 815.73 indent level is 1 With lamp enclosed in transparent housing
[List of Patents for class 340 subclass 815.74]  815.74           Subclass 815.74 indent level is 2 Combined
[List of Patents for class 340 subclass 815.75]  815.75           Subclass 815.75 indent level is 2 Light source modifier
[List of Patents for class 340 subclass 815.76]  815.76           Subclass 815.76 indent level is 3 Lens type
[List of Patents for class 340 subclass 815.77]  815.77           Subclass 815.77 indent level is 2 Relatively movable light source
[List of Patents for class 340 subclass 815.78]  815.78           Subclass 815.78 indent level is 1 Pointer indicator
[List of Patents for class 340 subclass 815.79]  815.79           Subclass 815.79 indent level is 2 Annunciator
[List of Patents for class 340 subclass 815.8]  815.8           Subclass 815.8 indent level is 3 Having electromagnetically releasable latch
[List of Patents for class 340 subclass 815.81]  815.81           Subclass 815.81 indent level is 1 Grouped drop annunciators
[List of Patents for class 340 subclass 815.82]  815.82           Subclass 815.82 indent level is 2 Support
[List of Patents for class 340 subclass 815.83]  815.83           Subclass 815.83 indent level is 1 Movable
[List of Patents for class 340 subclass 815.84]  815.84           Subclass 815.84 indent level is 2 Semaphore
[List of Patents for class 340 subclass 815.85]  815.85           Subclass 815.85 indent level is 2 Self restoring type annunciator
[List of Patents for class 340 subclass 815.86]  815.86           Subclass 815.86 indent level is 2 Rotary
[List of Patents for class 340 subclass 815.87]  815.87           Subclass 815.87 indent level is 3 Rotor driven
[List of Patents for class 340 subclass 815.88]  815.88           Subclass 815.88 indent level is 3 Vane indicator
[List of Patents for class 340 subclass 815.89]  815.89           Subclass 815.89 indent level is 2 Circuit closing type
[List of Patents for class 340 subclass 815.9]  815.9           Subclass 815.9 indent level is 2 By electromagnetically releasable latch
[List of Patents for class 340 subclass 815.91]  815.91           Subclass 815.91 indent level is 3 Having restoring means
[List of Patents for class 340 subclass 815.92]  815.92           Subclass 815.92 indent level is 3 Gravity operated drop annunciator
[List of Patents for class 340 subclass 384.1]  384.1           AUDIBLE INDICATION
[List of Patents for class 340 subclass 384.2]  384.2           Subclass 384.2 indent level is 1 Ultrasonic pest control
[List of Patents for class 340 subclass 384.3]  384.3           Subclass 384.3 indent level is 1 Simulation
[List of Patents for class 340 subclass 384.4]  384.4           Subclass 384.4 indent level is 1 Electronic siren (e.g., wail tone or yelp tone warning device)
[List of Patents for class 340 subclass 384.5]  384.5           Subclass 384.5 indent level is 1 With computer element
[List of Patents for class 340 subclass 384.6]  384.6           Subclass 384.6 indent level is 1 Piezoelectric
[List of Patents for class 340 subclass 384.7]  384.7           Subclass 384.7 indent level is 1 Electronic
[List of Patents for class 340 subclass 384.71]  384.71           Subclass 384.71 indent level is 2 Timing
[List of Patents for class 340 subclass 384.72]  384.72           Subclass 384.72 indent level is 2 Plural generators
[List of Patents for class 340 subclass 384.73]  384.73           Subclass 384.73 indent level is 2 With sound transducer details
[List of Patents for class 340 subclass 385.1]  385.1           Subclass 385.1 indent level is 1 Explosive
[List of Patents for class 340 subclass 387.1]  387.1           Subclass 387.1 indent level is 1 Weatherproofing
[List of Patents for class 340 subclass 388.1]  388.1           Subclass 388.1 indent level is 1 Diaphragm (e.g., horn or buzzer)
[List of Patents for class 340 subclass 390.1]  390.1           Subclass 390.1 indent level is 2 Rotary actuator
[List of Patents for class 340 subclass 390.2]  390.2           Subclass 390.2 indent level is 3 Having spring
[List of Patents for class 340 subclass 388.2]  388.2           Subclass 388.2 indent level is 2 Alternating current
[List of Patents for class 340 subclass 388.3]  388.3           Subclass 388.3 indent level is 2 With auxiliary flexible membrane
[List of Patents for class 340 subclass 388.4]  388.4           Subclass 388.4 indent level is 2 With resonance chamber
[List of Patents for class 340 subclass 388.5]  388.5           Subclass 388.5 indent level is 2 Armature support
[List of Patents for class 340 subclass 388.6]  388.6           Subclass 388.6 indent level is 3 Having spring
[List of Patents for class 340 subclass 388.7]  388.7           Subclass 388.7 indent level is 2 Interrupter
[List of Patents for class 340 subclass 388.8]  388.8           Subclass 388.8 indent level is 3 Having spring
[List of Patents for class 340 subclass 391.1]  391.1           Subclass 391.1 indent level is 2 Housing or mounting
[List of Patents for class 340 subclass 392.1]  392.1           Subclass 392.1 indent level is 1 Percussion-type sound producer (e.g., signal chimes or bells)
[List of Patents for class 340 subclass 392.2]  392.2           Subclass 392.2 indent level is 2 Rotary actuator
[List of Patents for class 340 subclass 393.1]  393.1           Subclass 393.1 indent level is 2 Plural armatures
[List of Patents for class 340 subclass 393.2]  393.2           Subclass 393.2 indent level is 2 Battery operated
[List of Patents for class 340 subclass 393.3]  393.3           Subclass 393.3 indent level is 2 Pushbutton
[List of Patents for class 340 subclass 393.4]  393.4           Subclass 393.4 indent level is 2 Including timer
[List of Patents for class 340 subclass 392.3]  392.3           Subclass 392.3 indent level is 2 Volume control
[List of Patents for class 340 subclass 401.1]  401.1           Subclass 401.1 indent level is 2 Alternating current
[List of Patents for class 340 subclass 398.1]  398.1           Subclass 398.1 indent level is 2 Nonelectrical driving means (e.g., spring or weight)
[List of Patents for class 340 subclass 398.2]  398.2           Subclass 398.2 indent level is 3 With electromagnetic control
[List of Patents for class 340 subclass 398.3]  398.3           Subclass 398.3 indent level is 4 Including circuit breaker
[List of Patents for class 340 subclass 392.4]  392.4           Subclass 392.4 indent level is 2 Tubular sound producer (e.g., signal chimes)
[List of Patents for class 340 subclass 392.5]  392.5           Subclass 392.5 indent level is 2 Resonator (e.g., signal chimes)
[List of Patents for class 340 subclass 395.1]  395.1           Subclass 395.1 indent level is 2 Suspended (e.g., locomotive bell)
[List of Patents for class 340 subclass 397.1]  397.1           Subclass 397.1 indent level is 2 Armature support
[List of Patents for class 340 subclass 397.2]  397.2           Subclass 397.2 indent level is 3 Having spring
[List of Patents for class 340 subclass 397.3]  397.3           Subclass 397.3 indent level is 2 Interrupter
[List of Patents for class 340 subclass 397.4]  397.4           Subclass 397.4 indent level is 3 Having spring
[List of Patents for class 340 subclass 397.5]  397.5           Subclass 397.5 indent level is 2 Polarized
[List of Patents for class 340 subclass 396.1]  396.1           Subclass 396.1 indent level is 2 Housing or mounting
[List of Patents for class 340 subclass 404.1]  404.1           Subclass 404.1 indent level is 1 Pneumatic-type sound producer (e.g., whistle or siren)
[List of Patents for class 340 subclass 404.2]  404.2           Subclass 404.2 indent level is 2 Rotary actuator
[List of Patents for class 340 subclass 404.3]  404.3           Subclass 404.3 indent level is 2 With valve
[List of Patents for class 340 subclass 999]  999           MISCELLANEOUS
 
FOREIGN ART COLLECTIONS
 
   FOR000          CLASS-RELATED FOREIGN DOCUMENTS
Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived.
              VEHICLE POSITION INDICATION (340/988)
   FOR400          Subclass FOR400 indent level is 1 Map display (340/995)
              LAND VEHICLE ALARM OR INDICATOR (340/425.5)
   FOR401          Subclass FOR401 indent level is 1 Of burglary or unauthorized use (340/426)
              CONDITION RESPONSIVE INDICATING SYSTEM (340/500)
              Subclass indent level is 1 With particular coupling link (340/531)
   FOR402          Subclass FOR402 indent level is 2 Radio (340/539)
              CONDITION RESPONSIVE INDICATING SYSTEM (340/500)
              Subclass indent level is 1 Specific condition (340/540)
              Subclass indent level is 2 Intrusion detection (340/541)
   FOR100          Subclass FOR100 indent level is 3 Door or window movement (340/545)
              CONDITION RESPONSIVE INDICATING SYSTEM (340/500)
              Subclass indent level is 1 Specific condition (340/540)
   FOR101          Subclass FOR101 indent level is 2 Article placement or removal (340/568)
   FOR102          Subclass FOR102 indent level is 3 Detectable device on protected article (340/572)
              CONDITION RESPONSIVE INDICATING SYSTEM (340/500)
              Subclass indent level is 1 Specific condition (340/540)
   FOR103          Subclass FOR103 indent level is 2 Human or animal (340/573)
              CONDITION RESPONSIVE INDICATING SYSTEM (340/500)
              Subclass indent level is 1 Specific condition (340/540)
              Subclass indent level is 2 Condition of electrical apparatus (340/635)
   FOR403          Subclass FOR403 indent level is 3 Battery (340/636)
   FOR104          Subclass FOR104 indent level is 2 Position responsive (340/686)
              CONDITION RESPONSIVE INDICATING SYSTEM (340/500)
   FOR105          Subclass FOR105 indent level is 1 Specified indicator structure (340/691)
              CONDITION RESPONSIVE INDICATING SYSTEM (340/500)
   FOR106          Subclass FOR106 indent level is 1 Specified power supply or housing (340/693)
              SELECTIVE (340/825)
   FOR203          Subclass FOR203 indent level is 1 Channel selection (340/825.03)
   FOR326          Subclass FOR326 indent level is 2 Plural stage matrix system (e.g., path finding) (340/826)
   FOR327          Subclass FOR327 indent level is 3 Alternate routing (340/827)
   FOR204          Subclass FOR204 indent level is 2 Code or pulse responsive (340/825.04)
   FOR107          Subclass FOR107 indent level is 1 Loop (340/825.05)
   FOR206          Subclass FOR206 indent level is 1 Monitoring and control (e.g., supervisory) (340/825.06)
   FOR207          Subclass FOR207 indent level is 2 Having addressing (340/825.07)
   FOR208          Subclass FOR208 indent level is 3 Polling or roll call (340/825.08)
   FOR209          Subclass FOR209 indent level is 2 Quiescent (340/825.09)
   FOR210          Subclass FOR210 indent level is 2 Scanning (340/825.1)
   FOR211          Subclass FOR211 indent level is 3 Continuous (340/825.11)
   FOR212          Subclass FOR212 indent level is 3 Interrupted (340/825.12)
   FOR213          Subclass FOR213 indent level is 4 Automatic (340/825.13)
   FOR214          Subclass FOR214 indent level is 2 Synchronization (340/825.14)
   FOR215          Subclass FOR215 indent level is 2 Having storage or recording (340/825.15)
   FOR216          Subclass FOR216 indent level is 2 Fault condition (340/825.16)
   FOR217          Subclass FOR217 indent level is 2 Having indicator (340/825.17)
   FOR218          Subclass FOR218 indent level is 2 Relay (340/825.18)
   FOR110          Subclass FOR110 indent level is 1 Intelligence comparison (340/825.3)
   FOR111          Subclass FOR111 indent level is 2 Authorization control (e.g., entry into an area) (340/825.31)
   FOR112          Subclass FOR112 indent level is 3 With alarm or indication of improper access (340/825.32)
   FOR113          Subclass FOR113 indent level is 3 Credit (340/825.33)
   FOR114          Subclass FOR114 indent level is 2 Authentication (e.g., indentity) (340/825.34)
   FOR115          Subclass FOR115 indent level is 2 Commodity (e.g., vending) (340/825.35)
   FOR311          SYSTEM WITH RECEIVER SELECTION (455/31.1)
   FOR312          Subclass FOR312 indent level is 1 Control of selectively responsive paging arrangement over telephone line (379/FOR 102)
   FOR321          Subclass FOR321 indent level is 1 Receiver scans for address signal (455/32.1)
   FOR381          Subclass FOR381 indent level is 1 Coded sequence (455/38.1)
   FOR382          Subclass FOR382 indent level is 2 Having actuation (e.g., turn on/off or alarm indication, etcl.) (455/38.2)
   FOR383          Subclass FOR383 indent level is 3 Power control or battery saving (455/38.3)
   FOR384          Subclass FOR384 indent level is 3 Visual indication (455/38.4)
   FOR385          Subclass FOR385 indent level is 3 Tone sequence (455/38.5)
              SELECTIVE (340/825)
              Subclass indent level is 1 Having indication or alarm (e.g., location indication) (340/825.36)
   FOR244          Subclass FOR244 indent level is 2 Code responsive (e.g., paging) (340/825.44)
   FOR245          Subclass FOR245 indent level is 3 Distress signal alarm (340/825.45)
   FOR246          Subclass FOR246 indent level is 3 Vibratory (tactual) alarm (340/825.46)
   FOR247          Subclass FOR247 indent level is 3 Group call (340/825.47)
   FOR248          Subclass FOR248 indent level is 3 Tone code (340/825.48)
   FOR108          Subclass FOR108 indent level is 1 Interrogation response (340/825.54)
   FOR109          Subclass FOR109 indent level is 2 Printout (e.g., logging) or display (340/825.55)
   FOR279          Subclass FOR279 indent level is 1 Matrix (340/825.79)
   FOR280          Subclass FOR280 indent level is 2 Plural stage (340/825.8)
   FOR281          Subclass FOR281 indent level is 2 Electroluminescent elements (340/825.81)
   FOR282          Subclass FOR282 indent level is 3 Light-emitting diode (340/825.82)
   FOR283          Subclass FOR283 indent level is 2 Programmable (340/825.83)
   FOR284          Subclass FOR284 indent level is 3 Having fusible element (340/825.84)
   FOR285          Subclass FOR285 indent level is 2 Semiconductor crosspoint (340/825.85)
   FOR286          Subclass FOR286 indent level is 3 Integrated circuit (340/825.86)
   FOR287          Subclass FOR287 indent level is 3 Logic (340/825.87)
   FOR288          Subclass FOR288 indent level is 3 Bistable (340/825.88)
   FOR289          Subclass FOR289 indent level is 3 Switching element (340/825.89)
   FOR290          Subclass FOR290 indent level is 3 Transistor (340/825.9)
   FOR291          Subclass FOR291 indent level is 4 Field effect transistor (340/825.91)
   FOR292          Subclass FOR292 indent level is 4 Four or more electrodes (340/825.92)
   FOR293          Subclass FOR293 indent level is 4 Plural (340/825.93)
   FOR294          Subclass FOR294 indent level is 3 Diode (340/825.94)
   FOR295          Subclass FOR295 indent level is 4 Charge storage (340/825.95)
   FOR296          Subclass FOR296 indent level is 4 Plural diodes at crosspoint (340/825.96)
              SYSTEMS (340/286.01)
   FOR404          Subclass FOR404 indent level is 1 Timer controlled (340/309.15)
   FOR301          Subclass FOR301 indent level is 1 Paging (340/311.1)

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