What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
Enter a class/subclass code here to get a list of patent titles. Use
any of the following forms:
363-131 121-55A 14-.5
that is, no embedded spaces, class and subclass seperated by a dash, and any
subclass letters capitalized. Currently Design Patent titles (those in the
classes of the form Dxx.yy) are not retreivable.
Class Number: 342 Class Title: COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION) Subclass Subclass Number Title 1 RADIO WAVE ABSORBER 2 .For aircraft or missile 3 .For camouflage 4 .With particular geometric configuration 5 RADAR REFLECTOR 6 .With modulation 7 .Corner 8 ..Inflatable or collapsable 9 ..Decoy or tow target 10 .Inflatable or collapsable 11 .With spherical lens (e.g., Luneberg lens) 12 .Chaff 13 RADAR EW (ELECTRONIC WARFARE) 14 .ECM (Electronic countermeasures, i.e., jamming) 15 ..With repeater 16 .ECCM (Electronic counter-countermeasures, i.e., antijamming) 17 ..Radar reacts to jamming 18 ...By changing frequency 19 ...By varying gain or blocking receiver 20 .Detection of surveilance 21 BASE BAND SYSTEM 22 TRANSMISSION THROUGH MEDIA OTHER THAN AIR OR FREE SPACE 23 BERTHING OR DOCKING 24 BLIND AID 25 SYNTHETIC APERTURE RADAR 26 WEATHER RADAR 27 PRESENCE DETECTION ONLY 28 .By motion detection 29 AIRCRAFT COLLISION AVOIDANCE SYSTEM (CAS) 30 .With transponder 31 ..Including synchronized clock 32 ..Included in Secondary Surveilance Radar (SSR) or Air Traffic Control Radio Beacon System (ATCRBS) 33 AIRCRAFT LANDING SYSTEM 34 .Ground control approach (GCA) 35 .Microwave landing system (MLS) 36 AIR TRAFFIC CONTROL 37 .Secondary Surveilance Radar (SSR) or Air Traffic Control Radar Beacon System (ATCRBS) 38 ..With altitude information 39 ..With side lobe suppression 40 ..With defruiting or degarbling 41 SHIP COLLISION AVOIDANCE 42 RADAR TRANSPONDER SYSTEM 43 .Combined with primary radar system 44 .Unique identity 45 .IFF or SIF 46 .Navigational 47 ..Distance measuring equipment (DME) 48 ...With automatic lock-on 49 ...With VOR/TACANN 50 .With Telemetry 51 .Transponder only 52 COMBINED WITH DIVERSE TYPE RADIANT ENERGY SYSTEM 53 .With infrared device 54 .With laser 55 .With television 56 .With direction finding 57 .With radio voice communication 58 .With transmission to a remote station 59 PLURAL RADAR 60 TRANSMITTING INTELLIGENCE 61 RETURN SIGNAL CONTROLS EXTERNAL DEVICE 62 .Missile or spacecraft guidance 63 .Aircraft guidance 64 ..With map matching 65 ..With terrain avoidance or alarm 66 .Camera 67 .Gun (e.g., fire control) 68 .Proximity fuze 69 .Device actuated by presence of land vehicle 70 .Radar mounted on and controls land vehicle 71 ..With control of brakes or steering 72 ..With control of safety device (e.g., air bags) 73 RETURN SIGNAL CONTROLS RADAR SYSTEM 74 .Antenna control 75 ..Physical orientation 76 ...With ground tracking 77 ...With signal error correction 78 ...Conical scan 79 ...Lobe switching 80 ...Monopulse 81 ..Beam direction by phase or frequency control 82 .Transmitter 83 ..Signal phase or frequency other than pulse repetition frequency (PRF) 84 ...Function of doppler frequency 85 ...Function of distance 86 ....With constant phase 87 ....With constant beat frequency 88 ..Transmission timing (e.g., ring around) 89 .Receiver 90 ..Automatic target detection 91 ..Gain or threshold 92 ...Automatic gain control (AGC) 93 ...Constant false alarm rate (CFAR) 94 ..Gating 95 ...Automatic range tracking 96 ....Automatic track while scan (ATWS) 97 ....With automatic lock-on 98 ..Frequency 99 ...Doppler frequency tracking 100 ....Wtih local osillator control 101 ....With filter control 102 ...Phase 103 ....Phase locked loop 104 DETERMINING VELOCITY 105 .Other than doppler (e.g., range rate) 106 .Combined with determining accelerationn 107 .Combined with determining distance and direction 108 ..With correlation 109 .Combined with determining distance 110 ..With plural fixed range gates 111 ..With plural receiver frequency band separation 112 ..With plural frequencies transmission 113 .Combined with determining direction (i.e., bearing) 114 .Combined with determining sense of motion (i.e., approaching or receding) 115 .Digital 116 .With plural received frequency band separation 117 .With plural beams (e.g., "Janus") 118 DETERMINING DISTANCE 119 .Miss distance indicator (MDI) 120 .Altimeter 121 ..With additional indicator 122 ..FM type 123 .Height finder 124 .Material level within container 125 .With remote cooperating station 126 .Triangulation 127 .Phase comparison 128 .With frequency modulation 129 ..Plural frequencies transmitted 130 ..Plural modulation 131 ...Combined with pulse modulation (e.g., frequency agile) 132 ....With pulse modulation (e.g., "Chirp") 133 ..Combined with determining direction 134 .With pulse modulation 135 ..Digital (e.g., with counter) 136 ...With plural fixed range gates 137 ..With variable pulse repetition frequency (PRF) or pulse width 138 ..With type "A" or "J" range scope 139 ..Combined with determining direction 140 ...With azimuth and elevation determination 141 ...Off boresight 142 ...With CRT display 143 ....Plural 144 ....PPI type 145 .With correlation 146 .Combined with determining direction 147 DETERMINING DIRECTION 148 .Low angle processing 149 .Monopulse 150 ..With common IF channel 151 ..With channel equalization 152 ..With quadrature difference processing 153 ..With particular antenna or waveguide 154 ..Combined with beam steering 155 .Lobe switching 156 .Interferometer 157 .With frequency or phase steering 158 .Scanning 159 CLUTTER ELIMINATION 160 .MTI (Moving target indicator) 161 ..With vehicle movement compensation (e.g., AMTI (Airborn MTI)) 162 ..Digital 163 ..With blind speed eliminationn 164 ..With storage tube 165 TESTING OR CALIBRATING OF RADAR SYSTEM 166 .Proximity fuze 167 .With laser 168 .With noise generation 169 .By simulation 170 ..Microwave 171 ..Doppler 172 ..With delay 173 .By monitoring 174 ..Calibrating 175 WITH PARTICULAR CIRCUIT 176 .Display 177 ..Plural 178 ..Projection type 179 ..Image production 180 ..Stereoscopic or tridimentional 181 ..Color 182 ..Electronic marker generation 183 ...Cursor 184 ..With stabilization (e.g., True Motion, True North) 185 ..Scan conversion 186 ..With sweep expansion 187 .Augmenter 188 .With polarization 189 .For correlation 190 .With recording 191 ..Mapping 192 .Spectrum analysis 193 ..Harmonic 194 .Complex signal (in phase and quadrature) 195 .Digital processing 196 ..Fast fourier transform (FFT) 197 ..With video quantizer 198 .For receiver protection 199 .Automatic frequency control (AFC) 200 .For frequency modulation 201 ..Combined with pulse modulation 202 .For pulse modulation 203 ..With noise reduction 204 ..With pulse shaping 205 .Sensitivity time control (STC) 350 DIRECTIVE 351 .Including a radiometer 352 .Including a satellite 353 ..Having a signal repeater 354 ..With beam steering 355 ..With control of satellite altitude 356 ..Synchronous satellite 357 ..With position indicating 358 ..With satellite signal correction 359 .Including antenna orientation 360 .Including antenna pattern plotting 361 .Including polarized signal communication transmitter or receiver 362 ..Receiver only 363 ...Circular 364 ...Elipticall 365 ..Circular 366 ..Eliptical 367 .Including directive communication system 368 .Including a steerable array 369 ..Injection radiation type 370 ..Retrodirective 371 ..With electronic scanning 372 ...Controlled 373 ..With a matrix 374 ..With a switch 375 ..With a delay line (e.g., serpentine transmission line, frequency scanning) 376 ..Including a remote energy source 377 ..Including a computer 378 .Utilizing correlation techniques 379 ..Side lobe elimination 380 ...Sum of each antenna channel signal 381 ...Difference of each antenna channel signal 382 ...Mixing each antenna channel signal 383 ..Sum of each antenna signal 384 ..Difference of each antenna channel signal 385 .Beacon or receiver 386 ..With transmisson of bearing or position determinative signals 387 ...Iso-chronic type 388 ....Loran 389 .....Loran-C 390 ......With cycle selection 391 .....Loran-A 392 ....With automatic gain control 393 ...Iso-frequency type 394 ...Iso-phase type 395 ....With hetrodyne synchronization 396 ....Omega 397 ....Decca 398 ...Rotating beacon signal 399 ...Tacan 400 ....Receiver only 401 .....VOR 402 ......Doppler 403 .......With circular array of antennas 404 ....VOR 405 .....Doppler 406 ......With circular array of antennas 407 ...Fixed course or bearing indicating 408 ....Moving beam 409 ....With superimposed images 410 ....Glide slope transmitter or receiver 411 .....Receiver only 412 .....Transmitter oly 413 ....Localizer transmitter or receiver 414 ....Distinctive frequencies equi-signal type 415 .....Coded equi-signal (e.g., A and N type) 416 .....Sequentially effective reflectors 417 ..Direction-finding receiver only 418 ...Doppler 419 ...Portable 420 ...With error or deviatioan compensator or eliminator 421 ....Pulse-type noise elimination or compensation (e.g., skyy waves) 422 ...With self-orienting antenna pattern 423 ....Plural antennas 424 .....Tracking interferometer 425 ....Conical scan antenna type 426 ....Step track antenna type 427 ....Monopulse or pseuodo monopulse tracking antenna type 428 ...With continuously movable antenna pattern 429 ....Including a stationary antenna 430 ....Including plural moving antennas 431 ....Including a goniometer 432 ...With plural fixed antenna pattern comparing 433 ....Successively commutated 434 .....Including more than two antennas 435 .....By diode switching 436 .....By modulation 437 ....Including more than two antennas 438 ....Including separate indicators 439 ....Including combined effect indicator 440 ....Including a goniometer 441 ...Having a goniometer 442 ...Having a phase detector 443 ...Having a direction indicator 444 ...Having plural receivers 445 ...Having more than two antennas 446 ....Unequal distance between at least three antennas 447 ...Having a spiral antennas 448 ...Having a coil or loop type antenna 449 ...Having a moving antenna 450 .Position indicating (e.g., triangulation) 451 ..By computer 452 ..By plotting table 453 ..By deflected or repeated signal 454 ..Traffic 455 ...Having collision avoidance 456 ...Having traffic control 457 ..Land vehicle location (e.g., bus, police car 458 ..Distance 459 ..Underground object location 460 ..Storm or atomic explosion location 461 ..With speed determination 462 ..With altitude determination 463 ..Having plural transmitters or receivers 464 ...Plural transmitters only 465 ...Plural receivers only