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[Search a list of Patent Appplications for class 375]  Class   375PULSE OR DIGITAL COMMUNICATIONS
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[List of Patents for class 375 subclass 130]  130           SPREAD SPECTRUM
[List of Patents for class 375 subclass 131]  131           Subclass 131 indent level is 1 Hybrid form
[List of Patents for class 375 subclass 132]  132           Subclass 132 indent level is 1 Frequency hopping
[List of Patents for class 375 subclass 133]  133           Subclass 133 indent level is 2 End-to-end transmission system
[List of Patents for class 375 subclass 134]  134           Subclass 134 indent level is 3 Having specific code acquisition or tracking
[List of Patents for class 375 subclass 135]  135           Subclass 135 indent level is 2 Transmitter
[List of Patents for class 375 subclass 136]  136           Subclass 136 indent level is 2 Receiver
[List of Patents for class 375 subclass 137]  137           Subclass 137 indent level is 3 Having specific code acquisition or tracking
[List of Patents for class 375 subclass 138]  138           Subclass 138 indent level is 1 Time hopping
[List of Patents for class 375 subclass 139]  139           Subclass 139 indent level is 1 Chirp
[List of Patents for class 375 subclass 140]  140           Subclass 140 indent level is 1 Direct sequence
[List of Patents for class 375 subclass 141]  141           Subclass 141 indent level is 2 End-to-end transmission system
[List of Patents for class 375 subclass 142]  142           Subclass 142 indent level is 3 Having correlation-type receiver
[List of Patents for class 375 subclass 143]  143           Subclass 143 indent level is 3 Having matched-filter-type receiver
[List of Patents for class 375 subclass 144]  144           Subclass 144 indent level is 3 Having multi-receiver or interference cancellation
[List of Patents for class 375 subclass 145]  145           Subclass 145 indent level is 3 Having specific signaling for code synchronization
[List of Patents for class 375 subclass 146]  146           Subclass 146 indent level is 2 Transmitter
[List of Patents for class 375 subclass 147]  147           Subclass 147 indent level is 2 Receiver
[List of Patents for class 375 subclass 148]  148           Subclass 148 indent level is 3 Multi-receiver or interference cancellation
[List of Patents for class 375 subclass 149]  149           Subclass 149 indent level is 3 Having specific code synchronization
[List of Patents for class 375 subclass 150]  150           Subclass 150 indent level is 3 Correlation-type receiver
[List of Patents for class 375 subclass 151]  151           Subclass 151 indent level is 4 Having SAW or charge-transfer device
[List of Patents for class 375 subclass 152]  152           Subclass 152 indent level is 3 Matched-filter-type receiver
[List of Patents for class 375 subclass 153]  153           Subclass 153 indent level is 4 Having SAW or charge-transfer device
[List of Patents for class 375 subclass 211]  211           REPEATERS
[List of Patents for class 375 subclass 212]  212           Subclass 212 indent level is 1 Ring or star configuration
[List of Patents for class 375 subclass 213]  213           Subclass 213 indent level is 1 Testing
[List of Patents for class 375 subclass 214]  214           Subclass 214 indent level is 1 Including pulse regeneration or conversion
[List of Patents for class 375 subclass 215]  215           Subclass 215 indent level is 2 Phase locked loop
[List of Patents for class 375 subclass 216]  216           APPARATUS CONVERTIBLE TO ANALOG
[List of Patents for class 375 subclass 217]  217           Subclass 217 indent level is 1 Muting circuit and squelch
[List of Patents for class 375 subclass 218]  218           EARTH OR WATER MEDIUM
[List of Patents for class 375 subclass 219]  219           TRANSCEIVERS
[List of Patents for class 375 subclass 220]  220           Subclass 220 indent level is 1 Transmission interface between two stations or terminals
[List of Patents for class 375 subclass 221]  221           Subclass 221 indent level is 1 Loopback mode
[List of Patents for class 375 subclass 222]  222           Subclass 222 indent level is 1 Modems (data sets)
[List of Patents for class 375 subclass 223]  223           Subclass 223 indent level is 2 Angle modulation
[List of Patents for class 375 subclass 224]  224           TESTING
[List of Patents for class 375 subclass 225]  225           Subclass 225 indent level is 1 Data rate
[List of Patents for class 375 subclass 226]  226           Subclass 226 indent level is 1 Phase error or phase jitter
[List of Patents for class 375 subclass 227]  227           Subclass 227 indent level is 1 Signal noise
[List of Patents for class 375 subclass 228]  228           Subclass 228 indent level is 1 With indicator
[List of Patents for class 375 subclass 229]  229           EQUALIZERS
[List of Patents for class 375 subclass 230]  230           Subclass 230 indent level is 1 Automatic
[List of Patents for class 375 subclass 231]  231           Subclass 231 indent level is 2 Training period or initial set up
[List of Patents for class 375 subclass 232]  232           Subclass 232 indent level is 2 Adaptive
[List of Patents for class 375 subclass 233]  233           Subclass 233 indent level is 3 Decision feedback equalizer
[List of Patents for class 375 subclass 234]  234           Subclass 234 indent level is 3 Fractionally spaced equalizer
[List of Patents for class 375 subclass 235]  235           Subclass 235 indent level is 3 Quadrature channels
[List of Patents for class 375 subclass 236]  236           Subclass 236 indent level is 3 Accumulator or up/down counter
[List of Patents for class 375 subclass 237]  237           PULSE NUMBER MODULATION
[List of Patents for class 375 subclass 238]  238           PULSE WIDTH MODULATION
[List of Patents for class 375 subclass 239]  239           PULSE POSITION, FREQUENCY, OR SPACING MODULATION
[List of Patents for class 375 subclass 240]  240           BANDWIDTH REDUCTION OR EXPANSION
[List of Patents for class 375 subclass 240.01]  240.01           Subclass 240.01 indent level is 1 Television or motion video signal
[List of Patents for class 375 subclass 240.02]  240.02           Subclass 240.02 indent level is 2 Adaptive
[List of Patents for class 375 subclass 240.03]  240.03           Subclass 240.03 indent level is 3 Quantization
[List of Patents for class 375 subclass 240.04]  240.04           Subclass 240.04 indent level is 4 Feed forward
[List of Patents for class 375 subclass 240.05]  240.05           Subclass 240.05 indent level is 4 Feed back
[List of Patents for class 375 subclass 240.06]  240.06           Subclass 240.06 indent level is 3 Feed forward
[List of Patents for class 375 subclass 240.07]  240.07           Subclass 240.07 indent level is 3 Feed back
[List of Patents for class 375 subclass 240.08]  240.08           Subclass 240.08 indent level is 2 Feature based
[List of Patents for class 375 subclass 240.09]  240.09           Subclass 240.09 indent level is 3 Polygonal approximation
[List of Patents for class 375 subclass 240.1]  240.1           Subclass 240.1 indent level is 3 Separate coders
[List of Patents for class 375 subclass 240.11]  240.11           Subclass 240.11 indent level is 4 Subband coding
[List of Patents for class 375 subclass 240.12]  240.12           Subclass 240.12 indent level is 2 Predictive
[List of Patents for class 375 subclass 240.13]  240.13           Subclass 240.13 indent level is 3 Intra/inter selection
[List of Patents for class 375 subclass 240.14]  240.14           Subclass 240.14 indent level is 3 Plural
[List of Patents for class 375 subclass 240.15]  240.15           Subclass 240.15 indent level is 3 Bidirectional
[List of Patents for class 375 subclass 240.16]  240.16           Subclass 240.16 indent level is 3 Motion vector
[List of Patents for class 375 subclass 240.17]  240.17           Subclass 240.17 indent level is 4 Half-pixel refinement
[List of Patents for class 375 subclass 240.18]  240.18           Subclass 240.18 indent level is 2 Transform
[List of Patents for class 375 subclass 240.19]  240.19           Subclass 240.19 indent level is 3 Wavelet
[List of Patents for class 375 subclass 240.2]  240.2           Subclass 240.2 indent level is 3 Discrete cosine
[List of Patents for class 375 subclass 240.21]  240.21           Subclass 240.21 indent level is 2 Subsampling
[List of Patents for class 375 subclass 240.22]  240.22           Subclass 240.22 indent level is 2 Vector quantization
[List of Patents for class 375 subclass 240.23]  240.23           Subclass 240.23 indent level is 2 Variable length coding
[List of Patents for class 375 subclass 240.24]  240.24           Subclass 240.24 indent level is 2 Block coding
[List of Patents for class 375 subclass 240.25]  240.25           Subclass 240.25 indent level is 2 Specific decompression process
[List of Patents for class 375 subclass 240.26]  240.26           Subclass 240.26 indent level is 2 Associated signal processing
[List of Patents for class 375 subclass 240.27]  240.27           Subclass 240.27 indent level is 3 Error detection or correction
[List of Patents for class 375 subclass 240.28]  240.28           Subclass 240.28 indent level is 3 Synchronization
[List of Patents for class 375 subclass 240.29]  240.29           Subclass 240.29 indent level is 3 Pre/post filtering
[List of Patents for class 375 subclass 241]  241           Subclass 241 indent level is 1 Pulse code modulation
[List of Patents for class 375 subclass 242]  242           PULSE CODE MODULATION
[List of Patents for class 375 subclass 243]  243           Subclass 243 indent level is 1 Correcting or reducing quantizing errors
[List of Patents for class 375 subclass 244]  244           Subclass 244 indent level is 1 Differential
[List of Patents for class 375 subclass 245]  245           Subclass 245 indent level is 2 Quantizer or inverse quantizer
[List of Patents for class 375 subclass 246]  246           Subclass 246 indent level is 2 Length coding
[List of Patents for class 375 subclass 247]  247           Subclass 247 indent level is 2 Single bit (delta)
[List of Patents for class 375 subclass 248]  248           Subclass 248 indent level is 3 Nonamplitude delta (area, etc.)
[List of Patents for class 375 subclass 249]  249           Subclass 249 indent level is 3 Compand (overload prevention)
[List of Patents for class 375 subclass 250]  250           Subclass 250 indent level is 4 Redundancy removal
[List of Patents for class 375 subclass 251]  251           Subclass 251 indent level is 4 Syllabic
[List of Patents for class 375 subclass 252]  252           Subclass 252 indent level is 3 Plural feedback loops
[List of Patents for class 375 subclass 253]  253           Subclass 253 indent level is 1 Length coding
[List of Patents for class 375 subclass 254]  254           Subclass 254 indent level is 1 Noise or distortion reduction
[List of Patents for class 375 subclass 256]  256           PULSE TRANSMISSION VIA RADIATED BASEBAND
[List of Patents for class 375 subclass 257]  257           CABLE SYSTEMS AND COMPONENTS
[List of Patents for class 375 subclass 258]  258           Subclass 258 indent level is 1 Transformer coupling
[List of Patents for class 375 subclass 259]  259           SYSTEMS USING ALTERNATING OR PULSATING CURRENT
[List of Patents for class 375 subclass 260]  260           Subclass 260 indent level is 1 Plural channels for transmission of a single pulse train
[List of Patents for class 375 subclass 261]  261           Subclass 261 indent level is 2 Quadrature amplitude modulation
[List of Patents for class 375 subclass 262]  262           Subclass 262 indent level is 3 Maximum likelihood decoder or viterbi decoder
[List of Patents for class 375 subclass 263]  263           Subclass 263 indent level is 3 Partial response
[List of Patents for class 375 subclass 264]  264           Subclass 264 indent level is 3 Multilevel
[List of Patents for class 375 subclass 265]  265           Subclass 265 indent level is 3 Trellis encoder or Trellis decoder
[List of Patents for class 375 subclass 267]  267           Subclass 267 indent level is 2 Diversity
[List of Patents for class 375 subclass 268]  268           Subclass 268 indent level is 1 Amplitude modulation
[List of Patents for class 375 subclass 269]  269           Subclass 269 indent level is 2 With phase or frequency shift keying
[List of Patents for class 375 subclass 270]  270           Subclass 270 indent level is 2 Vestigial or single sideband or suppressed carrier
[List of Patents for class 375 subclass 271]  271           Subclass 271 indent level is 1 Angle modulation
[List of Patents for class 375 subclass 272]  272           Subclass 272 indent level is 2 Frequency shift keying
[List of Patents for class 375 subclass 273]  273           Subclass 273 indent level is 3 Combined with phase shift keying
[List of Patents for class 375 subclass 274]  274           Subclass 274 indent level is 3 Minimum shift keying
[List of Patents for class 375 subclass 275]  275           Subclass 275 indent level is 3 More than two frequencies
[List of Patents for class 375 subclass 276]  276           Subclass 276 indent level is 3 One cycle or less per bit
[List of Patents for class 375 subclass 277]  277           Subclass 277 indent level is 3 Vestigial or single sideband, or suppressed carrier
[List of Patents for class 375 subclass 278]  278           Subclass 278 indent level is 3 Antinoise or distortion
[List of Patents for class 375 subclass 279]  279           Subclass 279 indent level is 2 Phase shift keying
[List of Patents for class 375 subclass 280]  280           Subclass 280 indent level is 3 More than two phases
[List of Patents for class 375 subclass 281]  281           Subclass 281 indent level is 4 Quaternary
[List of Patents for class 375 subclass 282]  282           Subclass 282 indent level is 3 Biphase (manchester codes)
[List of Patents for class 375 subclass 283]  283           Subclass 283 indent level is 3 Differential phase shift keying (diphase)
[List of Patents for class 375 subclass 284]  284           Subclass 284 indent level is 3 Antinoise or distortion
[List of Patents for class 375 subclass 285]  285           Subclass 285 indent level is 1 Antinoise or distortion
[List of Patents for class 375 subclass 286]  286           MULTILEVEL
[List of Patents for class 375 subclass 287]  287           Subclass 287 indent level is 1 With threshold level
[List of Patents for class 375 subclass 288]  288           Subclass 288 indent level is 1 Transmission line
[List of Patents for class 375 subclass 289]  289           Subclass 289 indent level is 1 Bipolar signal
[List of Patents for class 375 subclass 290]  290           Subclass 290 indent level is 1 Partial response
[List of Patents for class 375 subclass 291]  291           Subclass 291 indent level is 2 Duobinary
[List of Patents for class 375 subclass 292]  292           Subclass 292 indent level is 1 Disparity reduction
[List of Patents for class 375 subclass 293]  293           Subclass 293 indent level is 1 Synchronized
[List of Patents for class 375 subclass 294]  294           Subclass 294 indent level is 2 Phase locked loop
[List of Patents for class 375 subclass 295]  295           TRANSMITTERS
[List of Patents for class 375 subclass 296]  296           Subclass 296 indent level is 1 Antinoise or distortion (includes predistortion)
[List of Patents for class 375 subclass 297]  297           Subclass 297 indent level is 2 Power amplifier
[List of Patents for class 375 subclass 298]  298           Subclass 298 indent level is 1 Quadrature amplitude modulation
[List of Patents for class 375 subclass 299]  299           Subclass 299 indent level is 1 Plural diversity
[List of Patents for class 375 subclass 300]  300           Subclass 300 indent level is 1 Amplitude modulation
[List of Patents for class 375 subclass 301]  301           Subclass 301 indent level is 2 Single or vestigial sideband or suppressed carrier
[List of Patents for class 375 subclass 302]  302           Subclass 302 indent level is 1 Angle modulation
[List of Patents for class 375 subclass 303]  303           Subclass 303 indent level is 2 Frequency shift keying
[List of Patents for class 375 subclass 304]  304           Subclass 304 indent level is 3 Antenna tuning with frequency shift
[List of Patents for class 375 subclass 305]  305           Subclass 305 indent level is 3 Minimum shift keying
[List of Patents for class 375 subclass 306]  306           Subclass 306 indent level is 3 One oscillator
[List of Patents for class 375 subclass 307]  307           Subclass 307 indent level is 3 Two or more oscillators
[List of Patents for class 375 subclass 308]  308           Subclass 308 indent level is 2 Phase shift keying
[List of Patents for class 375 subclass 309]  309           Subclass 309 indent level is 1 Keying circuits
[List of Patents for class 375 subclass 310]  310           Subclass 310 indent level is 2 Remote controlled
[List of Patents for class 375 subclass 311]  311           Subclass 311 indent level is 2 Automatic
[List of Patents for class 375 subclass 312]  312           Subclass 312 indent level is 2 Power or bias voltage supply keying
[List of Patents for class 375 subclass 313]  313           Subclass 313 indent level is 2 Key shock or click prevention
[List of Patents for class 375 subclass 314]  314           Subclass 314 indent level is 2 Including auxiliary control tube
[List of Patents for class 375 subclass 315]  315           Subclass 315 indent level is 2 Modulation by absorption of signal, changing antenna dimension or changing antenna impedance
[List of Patents for class 375 subclass 316]  316           RECEIVERS
[List of Patents for class 375 subclass 317]  317           Subclass 317 indent level is 1 Automatic baseline or threshold adjustment
[List of Patents for class 375 subclass 318]  318           Subclass 318 indent level is 2 Differential amplifier
[List of Patents for class 375 subclass 319]  319           Subclass 319 indent level is 2 Automatic bias circuit for DC restoration
[List of Patents for class 375 subclass 320]  320           Subclass 320 indent level is 1 Amplitude modulation
[List of Patents for class 375 subclass 321]  321           Subclass 321 indent level is 2 Single or vestigial sideband or suppressed carrier
[List of Patents for class 375 subclass 322]  322           Subclass 322 indent level is 1 Angle modulation
[List of Patents for class 375 subclass 323]  323           Subclass 323 indent level is 2 Combined phase shift keyed and frequency shift keyed
[List of Patents for class 375 subclass 324]  324           Subclass 324 indent level is 2 Particular demodulator
[List of Patents for class 375 subclass 325]  325           Subclass 325 indent level is 3 Including coherent detector
[List of Patents for class 375 subclass 326]  326           Subclass 326 indent level is 3 Carrier recovery circuit or carrier tracking
[List of Patents for class 375 subclass 327]  327           Subclass 327 indent level is 3 Phase locked loop
[List of Patents for class 375 subclass 328]  328           Subclass 328 indent level is 3 Including switching or gating (digital circuits)
[List of Patents for class 375 subclass 329]  329           Subclass 329 indent level is 2 Phase shift keying
[List of Patents for class 375 subclass 330]  330           Subclass 330 indent level is 3 Differential (diphase)
[List of Patents for class 375 subclass 331]  331           Subclass 331 indent level is 4 More than two phases
[List of Patents for class 375 subclass 332]  332           Subclass 332 indent level is 3 Plural phase (>2)
[List of Patents for class 375 subclass 333]  333           Subclass 333 indent level is 3 Biphase (manchester code)
[List of Patents for class 375 subclass 334]  334           Subclass 334 indent level is 2 Frequency shift keying
[List of Patents for class 375 subclass 335]  335           Subclass 335 indent level is 3 More than two frequencies
[List of Patents for class 375 subclass 336]  336           Subclass 336 indent level is 3 Minimum shift keying
[List of Patents for class 375 subclass 337]  337           Subclass 337 indent level is 3 Separate mark and space channels
[List of Patents for class 375 subclass 338]  338           Subclass 338 indent level is 1 Interrupted carrier wave
[List of Patents for class 375 subclass 339]  339           Subclass 339 indent level is 2 Carrier controlling local generator
[List of Patents for class 375 subclass 340]  340           Subclass 340 indent level is 1 Particular pulse demodulator or detector
[List of Patents for class 375 subclass 341]  341           Subclass 341 indent level is 2 Maximum likelihood decoder or viterbi decoder
[List of Patents for class 375 subclass 342]  342           Subclass 342 indent level is 2 Locating predetermined portion of pulse
[List of Patents for class 375 subclass 343]  343           Subclass 343 indent level is 2 Correlative or matched filter
[List of Patents for class 375 subclass 344]  344           Subclass 344 indent level is 1 Automatic frequency control
[List of Patents for class 375 subclass 345]  345           Subclass 345 indent level is 1 Automatic gain control
[List of Patents for class 375 subclass 346]  346           Subclass 346 indent level is 1 Interference or noise reduction
[List of Patents for class 375 subclass 347]  347           Subclass 347 indent level is 2 Diversity (frequency or time)
[List of Patents for class 375 subclass 348]  348           Subclass 348 indent level is 2 Intersymbol interference
[List of Patents for class 375 subclass 349]  349           Subclass 349 indent level is 2 Plural signal paths in receiver
[List of Patents for class 375 subclass 350]  350           Subclass 350 indent level is 2 By filtering (e.g., digital)
[List of Patents for class 375 subclass 351]  351           Subclass 351 indent level is 2 Gating, blanking, etc.
[List of Patents for class 375 subclass 352]  352           Subclass 352 indent level is 1 With electromagnetic relay or solenoid
[List of Patents for class 375 subclass 353]  353           PULSE AMPLITUDE MODULATION
[List of Patents for class 375 subclass 354]  354           SYNCHRONIZERS
[List of Patents for class 375 subclass 355]  355           Subclass 355 indent level is 1 Synchronizing the sampling time of digital data
[List of Patents for class 375 subclass 356]  356           Subclass 356 indent level is 1 Network synchronizing more than two stations
[List of Patents for class 375 subclass 357]  357           Subclass 357 indent level is 1 Synchronization failure prevention
[List of Patents for class 375 subclass 358]  358           Subclass 358 indent level is 1 Feedback, receiver to transmitter
[List of Patents for class 375 subclass 359]  359           Subclass 359 indent level is 1 Self-synchronizing signal (self-clocking codes, etc.)
[List of Patents for class 375 subclass 360]  360           Subclass 360 indent level is 2 With transition detector
[List of Patents for class 375 subclass 361]  361           Subclass 361 indent level is 2 Manchester code or biphase code
[List of Patents for class 375 subclass 362]  362           Subclass 362 indent level is 1 Frequency or phase control using synchronizing signal
[List of Patents for class 375 subclass 363]  363           Subclass 363 indent level is 2 Synchronization bit insertion into artificially created gaps
[List of Patents for class 375 subclass 364]  364           Subclass 364 indent level is 2 Synchronization signals with unique amplitude, polarity, length, or frequency
[List of Patents for class 375 subclass 365]  365           Subclass 365 indent level is 2 Synchronization word
[List of Patents for class 375 subclass 366]  366           Subclass 366 indent level is 3 Plurality of synchronization words
[List of Patents for class 375 subclass 367]  367           Subclass 367 indent level is 3 Pseudo noise
[List of Patents for class 375 subclass 368]  368           Subclass 368 indent level is 3 Synchronizer pattern recognizers
[List of Patents for class 375 subclass 369]  369           Subclass 369 indent level is 2 Start - stop
[List of Patents for class 375 subclass 370]  370           Subclass 370 indent level is 3 With asynchronous data
[List of Patents for class 375 subclass 371]  371           Subclass 371 indent level is 1 Phase displacement, slip or jitter correction
[List of Patents for class 375 subclass 372]  372           Subclass 372 indent level is 2 Elastic buffer
[List of Patents for class 375 subclass 373]  373           Subclass 373 indent level is 2 Phase locking
[List of Patents for class 375 subclass 374]  374           Subclass 374 indent level is 3 With charge pump or up and down counters
[List of Patents for class 375 subclass 375]  375           Subclass 375 indent level is 3 With frequency detector and phase detector
[List of Patents for class 375 subclass 376]  376           Subclass 376 indent level is 3 Phase locked loop
[List of Patents for class 375 subclass 377]  377           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.
   FOR100          SPREAD SPECTRUM (375/200)
   FOR101          Subclass FOR101 indent level is 1 Hybrid forms (375/201)
   FOR102          Subclass FOR102 indent level is 1 Frequency hopping (375/202)
   FOR103          Subclass FOR103 indent level is 1 Time hopping (375/203)
   FOR104          Subclass FOR104 indent level is 1 Pulsed FM or chirp (375/204)
   FOR105          Subclass FOR105 indent level is 1 Direct sequence (375/206)
   FOR106          Subclass FOR106 indent level is 1 Matched filter (375/207)
   FOR107          Subclass FOR107 indent level is 1 Pseudo-noise correlation (375/208)
   FOR108          Subclass FOR108 indent level is 2 Auto-correlation (375/209)
   FOR109          Subclass FOR109 indent level is 2 Cross-correlation (375/210)

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