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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 455 | TELECOMMUNICATIONS |
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1 | INTERFERENCE SIGNAL TRANSMISSION (E.G., JAMMING) |
2.01 | AUDIENCE SURVEY OR PROGRAM DISTRIBUTION USE ACCOUNTING |
3.01 | WIRELESS DISTRIBUTION SYSTEM |
3.02 | Receiver for satellite broadcast |
3.03 | Remote control of distribution |
3.05 | Two-way |
3.06 | Combined with diverse art device (e.g., audio/sound or entertainment system) |
400 | HAVING SINGLE-CHANNEL TELEPHONE CARRIER |
403 | RADIOTELEPHONE SYSTEM |
404.1 | Emergency or alarm communication |
405 | Usage measurement |
410 | Security or fraud prevention |
412.1 | Message storage or retrieval |
414.1 | Special service |
414.2 | User location independent information retrieval |
414.3 | Based on request (e.g., news, weather, etc.) |
414.4 | Format conversion (e.g., text, audio, etc.) |
415 | Caller identification |
416 | Call conferencing |
417 | Call diversion |
418 | Programming control |
421 | Out-of-range indication |
422.1 | Zoned or cellular telephone system |
423 | Diagnostic testing, malfunction indication, or electrical condition measurement |
426.1 | Including other radio communication system (e.g., cordless telephone, paging, trunking, etc.) |
426.2 | Wireless service for fixed premises equipment (e.g., Wireless Local Loop (WLL) Telco emulator, etc.) |
427 | Space satellite |
431 | Airborne or aircraft |
432.1 | Roaming |
432.2 | System format conversion |
432.3 | Service profile |
433 | Home location registration (HLR) or visitor location registration (VLR) detail |
434 | Control or access channel scanning |
435.1 | Registration |
436 | Handoff |
437 | Mobile assisted or initiated |
438 | Serving site initiated |
439 | Handoff initiated by another source (e.g., target, user initiated, mobile switching center (MSC), or mobile telephone switching office (MTSO), etc.) |
440 | Based upon unit location |
441 | Based upon unit velocity |
442 | Soft handoff |
443 | Overlapping cells |
444 | Between macro and micro cells |
445 | Call routing (e.g., to prevent backhaul, routing efficiency, least cost, or alternate routing) |
446 | Including cell planning or layout |
450 | Channel allocation |
451 | Hybrid allocation |
452.1 | Dynamic allocation |
453 | Load balancing |
454 | Spectrum sharing for different type of system (e.g., point-to-point microwave, television, etc.) |
455 | Channel seizing |
456.1 | Location monitoring |
456.2 | Based on request signal |
456.3 | Position based personal service |
456.4 | Quiet or transmission prevention mode |
456.5 | At system equipment (i.e., base station) |
456.6 | At remote station (i.e., mobile station) |
457 | Location display |
458 | Specific paging technique |
461 | Including personal numbering system (i.e., intelligent network for subscriber tracking or follow-me subscriber feature) |
462 | Including private cordless extension system |
465 | Including public cordless extension system |
466 | Auxiliary data signaling (e.g., short message service (SMS)) |
7 | CARRIER WAVE REPEATER OR RELAY SYSTEM (I.E., RETRANSMISSION OF SAME INFORMATION) |
8 | Failure compensation (e.g., spare channel) |
9 | Monitoring |
11.1 | Portable or mobile repeater |
14 | With transmission line |
15 | Two separate way transmission |
17 | Plural modulated carriers |
18 | With delay or recording |
19 | Common antenna |
20 | With frequency conversion |
23 | Frequency or phase modulation |
24 | Transmitter/receiver feedback compensation |
25 | Directive antenna |
26.1 | USE OR ACCESS BLOCKING (E.G., LOCKING SWITCH) |
39 | TRANSMITTER AND RECEIVER AT SEPARATE STATIONS |
40 | Earth or water medium |
41.1 | Near field (i.e., inductive or capacitive coupling) |
41.2 | Short range RF communication |
42 | Frequency or phase modulation |
43 | With modification of frequencies of analog signal passed (e.g., pre-emphasis and de-emphasis) |
44 | With stated modulation index |
45 | Via subcarrier |
46 | Suppressed carrier wave system |
47 | Single or vestigial sideband system |
48 | Inverted sideband |
500 | Plural transmitters or receivers (i.e., more than two stations) |
501 | Noise, distortion, or singing reduction |
507 | Central station (e.g., master, etc.) |
508 | Having console |
509 | Channel allocation |
510 | Plural requests (e.g., retries) |
511 | Control channel/voice channel conversion |
512 | Based on priority |
513 | Ranking (e.g., based on signal strength, etc.) |
514 | Having storage detail |
515 | Control channel monitoring (i.e., paging or access channel signaling) for system access |
516 | Channel seizing |
517 | To or from mobile station |
518 | Having talk group |
519 | Talk group forming (e.g., dynamic regrouping, talk group assignment) |
520 | On-site or multi-site trunking |
521 | Emergency dispatch or response |
522 | Transmission power control technique |
523 | Using radiating transmission line |
524 | Multiple base stations |
526 | Plural receivers tuned to common frequency |
527 | Break-in or priority override |
528 | Lockout or busy-idle signaling |
59 | Single message via plural carrier wave transmission |
61 | Single message via plural modulation of single carrier |
62 | Optimum frequency selection |
63.1 | Distortion, noise, or other interference prevention, reduction, or compensation |
63.2 | System with hierarchical coverage areas |
63.3 | Frequency switching |
63.4 | Directional antenna |
64 | Plasma source or barrier |
65 | Anti-multipath |
66.1 | Having diverse art device |
67.11 | Having measuring, testing, or monitoring of system or part |
67.12 | Using a chamber (e.g., room testing or audio surveillance, etc.) |
67.13 | Noise, distortion, or unwanted signal detection (e.g., quality control, etc.) |
67.14 | Using a test signal |
67.15 | Of a microwave link or system |
67.16 | Phase measuring (e.g., group delay, propagation effect, etc.) |
67.7 | With indication (e.g., visual or voice signalling, etc.) |
68 | With control signal |
73 | TRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER) |
74 | Convertible (e.g., to diverse art device) |
75 | With frequency stabilization (e.g., automatic frequency control) |
77 | With tuning |
78 | With transmitter-receiver switching or interaction prevention |
84 | With a common signal processing stage |
88 | Transceiver controlling a separate transceiver or receiver |
550.1 | Radiotelephone equipment detail |
551 | Number assignment module (NAM) detail |
552.1 | Operable on more than one system |
553.1 | Radiotelephone having plural transceivers (e.g., for analog and digital, trunking and cellular, etc.) |
554.1 | Remote private branch exchange (PBX) with wireless link to landline |
554.2 | Equipment detail for providing wireless link to fixed equipment (e.g., WLL, Telco emulator, etc.) |
555 | Wireless private branch exchange (PBX) (i.e., wireless link to extension unit) |
556.1 | Integrated with other device |
557 | Interface attached device (e.g., interface with modem, facsimile, computer, etc.) |
560 | Switching unit detail (e.g., mobile telephone switching office (MTSO), base station controller (BSC), etc.) |
561 | Base station detail |
563 | Having voice recognition or synthesization |
564 | Auto-dialing or repertory dialing (e.g., using bar code, etc.) |
565 | Restrictive dialing circuitry |
566 | Having display |
567 | Call alerting |
569.1 | Hands-free or loudspeaking arrangement |
571 | Power booster |
572 | Power supply |
575.1 | Housing or support |
90.1 | Having particular application (e.g., avalanche victim assistance) of a transceiver |
90.2 | Having particular configuration (e.g., C.B., or walkie-talkie) of a transceiver |
90.3 | Having particular housing or support of a transceiver |
91 | TRANSMITTER |
92 | Remote control of a transmitter |
93 | Convertible to different type (e.g., AM to FM) |
94 | Alternator |
95 | Mobile or portable |
96 | Transmitter ejected from moving vehicle |
97 | With antenna ejection or external support |
98 | With aircraft, satellite, or projectile |
99 | With vehicle |
100 | Body attached or connected |
101 | Diversity |
102 | Plural modulation |
103 | Plural separate transmitters or channels |
106 | Modulation by absorption, shielding, or reflecting |
107 | With variation of antenna impedance or dimension for modulation |
108 | Amplitude modulation |
110 | Angle modulation |
111 | Including distributed parameter structure |
112 | With frequency multiplication or division |
113 | With frequency control |
114.1 | Having harmonic radiation suppression |
114.2 | Noise or interference elimination |
115.1 | Measuring, testing, or monitoring of transmitter |
116 | Carrier amplitude control (e.g., voice operated on/off) |
117 | With electrical protection of transmitter circuit or operator |
118 | Frequency conversion |
119 | Carrier frequency stabilization |
120 | Including tuning |
126 | With feedback of modulated output signal |
127.1 | Power control, power supply, or bias voltage supply |
128 | With casing or housing |
129 | With coupled antenna |
130 | RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER |
131 | Frequency conversion between signal source (e.g., wave collector) and receiver |
132 | Plural receivers |
133 | With output selecting |
134 | By signal strength |
135 | By signal quality (e.g., signal to noise ratio) |
136 | With control (e.g., automatic gain control, automatic frequency control, etc.) |
137 | With output combining |
140 | Selectively actuated or controlled |
141 | Including common stage (e.g., local oscillator) |
142 | Convertible to different type (e.g., AM to FM) |
145 | Panoramic display |
146 | Plural separate paths or plural oscillators |
147 | Particular local oscillator control |
148 | With oscilloscope sweep signal derivation or control |
149 | Plural output (e.g., plural speakers) (not stereo) |
150.1 | Signal selection based on frequency (e.g., tuning) |
151.1 | Remote control of channel or station selection |
151.2 | Wireless link (sonic, RF, or infrared) |
151.3 | Remote oscillator tuned |
151.4 | Plural electronic devices controlled |
152.1 | Of or combined with vehicle receiver |
153.1 | Mechanical |
154.1 | With indication of frequency, channel, or selector condition (e.g., tuning aid) |
154.2 | Scanning display |
155.1 | By meter |
156.1 | Audible indicator |
157.1 | Analog frequency indication (e.g., dial) |
158.1 | Channel index indication |
158.2 | With electronic digital indication |
158.4 | With multiple display functions |
158.5 | Non-numeric display (e.g., call letters) |
159.1 | Variable light indication |
160.1 | Plural tuning modes (e.g., manual and scanning, etc.) |
161.1 | Frequency scanning |
161.2 | With processor control |
161.3 | Using signal strength or quality |
162.1 | Motor activated |
164.1 | With automatic frequency control |
165.1 | With frequency synthesizer |
166.1 | With channel skipping selection |
167.1 | With dual sweeping |
168.1 | Multiband |
169.1 | With particular variable voltage or current tuning |
170.1 | With mechanical or electromechanical selection |
171.1 | Time actuated |
173.1 | With automatic frequency control of fine tuning |
174.1 | With muting (e.g., silent tuning) |
175.1 | With carrier wave preset |
176.1 | Combined with band selection |
177.1 | Combined with other control (e.g., bandwidth, volume, gain, etc.) |
178.1 | With plurality of tunable circuits |
179.1 | Channel or station selection |
180.1 | Combined with band selection |
181.1 | Time controlled |
182.1 | With frequency control |
182.3 | Fine tuning |
183.1 | With frequency synthesizer |
184.1 | With comparing desired and existing tuning conditions |
185.1 | With channel information storage |
187.1 | Separate tuned circuits for each channel or station |
188.1 | Band selection |
188.2 | UHF and VHF |
189.1 | With plural separate mixer or converter circuits |
190.1 | With frequency conversion |
191.1 | With plurality of tuned circuits |
192.1 | With frequency control |
193.1 | With antenna circuit tuning |
194.1 | With muting (e.g., silent tuning) |
195.1 | Variable voltage or current tuning |
196.1 | Including variation of local oscillator frequency |
200.1 | With other control (e.g., volume, gain, bandwidth, etc.) |
201 | Exalted carrier |
202 | Suppressed carrier |
203 | Carrier and single sideband |
204 | Vestigial sideband |
205 | Frequency or phase modulation |
206 | Responsive to one of overlapping signals |
207 | With plural conversion |
208 | With synchronized or controlled local oscillator |
210 | With carrier amplitude modulation elimination (e.g., specified limiter) |
212 | With squelch or other audio output silencing |
214 | With particular discriminator or detector |
216 | With particular frequency division or multiplication |
217 | With protection circuit for receiver circuit |
218 | Squelch |
219 | With automatic gain or volume control |
220 | Adjustable |
221 | Audio responsive |
222 | Noise controlled |
225 | Plural paths |
226.1 | Measuring or testing of receiver |
227 | Responsive to an input signal of particular predetermined frequency |
228 | Responsive to specified modulation (e.g., call alarm, Conelrad) |
229 | Responsive to carrier absence or presence |
230 | Local control of receiver operation |
231 | Applied at or for specific intervals or periods of time |
232.1 | Gain control |
233.1 | With diverse control (tone, etc.) |
234.1 | Automatic |
234.2 | Processor controlled |
235.1 | Forward acting |
236.1 | Variable conversion efficiency (variable oscillator amplitude, etc.) |
237.1 | Responsive to locally injected pilot |
238.1 | Responsive to vehicle speed |
239.1 | Nonlinear automatic gain control |
240.1 | Variable automatic gain control loop gain |
241.1 | Different gain stages |
242.1 | Delayed |
242.2 | Different delay for different signal stages or thresholds |
243.1 | Radio frequency stage only delayed |
244.1 | Dual time constant |
245.1 | Automatic gain control signal derived from information signal |
246.1 | Responsive to plural inputs |
248.1 | Constant or controlled input impedance |
249.1 | Variable attenuator type |
250.1 | Automatic gain control to improve strong signal handling |
251.1 | Plural stages with different levels or bias to each stage (e.g., partial automatic gain control) |
252.1 | Semiconductor |
253.1 | Plural stages controlled with plates, screen grids, or cathodes connected in parallel |
253.2 | Plural amplifier stages |
254 | Sensitivity control |
255 | Local oscillator frequency control |
256 | Combined with other control |
257 | Automatic |
266 | Selectivity or bandwidth control |
267 | Tone control |
268 | Fidelity control |
269 | With wave collector (e.g., antenna) |
270 | Power-line or receiver element used as wave collector |
271 | Suppression of radiation from receiver via wave collector |
272 | Plural separate collectors |
273 | With particular output combining |
275 | With frequency changing or selecting in the output path of one or more collectors |
276.1 | With phase shifting, correcting, or regulating in the output path of one or more collectors |
277.1 | Selectively or alternately connected to receiver |
278.1 | Combined with noise or interference elimination |
280 | With coupling to a stage of the receiver |
281 | Having distributed parameters |
283 | Undesired signal or noise control (e.g., antistatic) |
284 | Balancing or cancelling |
285 | With image frequency suppression |
286 | Wave filter, coil, or wave trap |
287 | Shunt or bypass |
288 | Particular composition (e.g., of cell or element) |
289 | With coupling varying, regulating, or control |
290 | Including passive tuned circuit |
291 | Using active device (e.g., as preamplifier or reactance) |
292 | Transformer or other passive inductance |
293 | Specified stage (e.g., mixer, amplifier, or demodulator) |
295 | Modulation distortion or cross talk correction or elimination |
296 | Noise or interference elimination |
297 | In vehicle |
298 | Originating in power supply |
300 | By shielding |
302 | Image frequency suppression |
303 | Using plural separate signal paths |
307 | With specific filter structure |
308 | With amplitude limiter |
310 | Internally generated noise or oscillations |
311 | In radio frequency amplifier, intermediate frequency amplifier or converter circuit |
312 | In demodulator or low frequency (e.g., audio frequency) |
313 | Frequency modifying or conversion |
314 | Plural separate successive conversions |
317 | Unwanted oscillation or radiation prevention |
318 | With specified local oscillator structure or coupling |
319 | With particular coupling |
321 | In a single envelope or with common active element (e.g., autodyne) |
323 | Particular frequency conversion structure or circuitry |
334 | With particular receiver circuit |
335 | Plural diverse function tube or stage (performs plural functions alternately or concurrently) |
336 | Superregenerative detector or discriminator |
337 | Discriminator or demodulator |
338 | Coupling or decoupling between stages |
341 | Amplifier |
343.1 | Having particular power or bias supply (including self-powered or battery saving means) |
344 | Combined with diverse art device |
347 | Cabinet, housing, or chassis structure |
348 | With retractable or readily detachable chassis |
349 | Sectional or interconnectable (e.g., modules) |
350 | With particular speaker mounting |
351 | Transportable |
352 | Remote control of receiver |
899 | 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. | ||
FOR106 | PLURAL TRANSMITTERS OR RECEIVERS (I.E., MORE THAN TWO STATIONS) (455/49.1) |
FOR107 | Noise, distortion, or singing reduction (455/50.1) |
FOR113 | With central station (e.g., master, etc.) (455/53.1) |
FOR114 | To or from mobile station (455/54.1) |
FOR115 | With service request and response (455/54.2) |
FOR116 | Using radiating transmission line (455/55.1) |
FOR117 | Multiple base stations (455/56.1) |
FOR118 | Plural receivers tuned to common frequency (455/57.1) |
FOR119 | Break-in or priority override (455/58.1) |
FOR120 | Lockout or busy-idle signalling (455/58.2) |
FOR121 | PORTABLE OR MOBILE TRANSCEIVER (455/89) |
FOR200 | HAVING SINGLE CHANNEL TELEPHONE CARRIER (379/64) |
FOR201 | Including call signalling (e.g., ringing, off-hook, dialing) (379/65) |
FOR202 | Over power line (379/66) |
FOR203 | EXCLUSIVE ASSIGNED CHANNEL (455/34.1) |
FOR204 | SEIZED CHANNEL (455/34.2) |
FOR205 | RADIO TELEPHONE SYSTEM OR EQUIPMENT DETAIL (379/58) |
FOR206 | Zoned or cellular (379/59, 455/33.1) |
FOR210 | Including cordless extension set (i.e., having single subscriber line access) (379/61) |
FOR212 | Including supervisory or control signalling (379/63) |
FOR213 | AUDIENCE SURVEY OR PROGRAM DISTRIBUTION USE ACCOUNTING (455/2) |
FOR214 | DISTRIBUTION SYSTEM (E.G., PLURAL CABLES, ETC.) (455/3.1) |
FOR215 | Receiver for satellite broadcast (455/3.2) |
FOR216 | Combined with power distribution network (455/3.3) |
FOR217 | Remote control of distribution (455/4.1) |
FOR219 | Two-way (455/5.1) |
FOR220 | Common antenna or cable (455/6.1) |
FOR222 | Combined with diverse art device (e.g., audio/sound or entertainment systems) (455/6.3) |
FOR223 | Near field (e.g., inductive or capacitive coupling) (455/41) |
FOR224 | Distortion, noise, or other interference prevention, reduction, or compensation (455/63) |
FOR225 | With diverse art device (455/66) |
FOR226 | With measuring, testing, or monitoring of system or part (455/67.1) |
FOR227 | Using a chamber (e.g., room testing or audio surveillance, etc.) (455/67.2) |
FOR228 | Noise, distortion or unwanted signal detection (e.g., quality control, etc.) (455/67.3) |
FOR229 | Using a test signal (455/67.4) |
FOR230 | Of a microwave link or system (455/67.5) |
FOR231 | Phase measuring (e.g., group delay propagation effects, etc.) (455/67.6) |
FOR232 | Housing or support (455/90) |
FOR233 | With harmonic radiation suppression (455/114) |
FOR234 | Measuring, testing, or monitoring of transmitter (455/115) |
FOR235 | Power or bias voltage supply (455/127) |
FOR236 | With particular power or bias supply (includes battery saving means and includes self-powered) (455/343) |
FOR237 | Emergency or alarm communication (455/404) |
FOR238 | Message storage or retrieval (455/412) |
FOR239 | Special service (455/414) |
FOR240 | Zoned or cellular telephone system (455/422) |
FOR241 | Including other radio communication system (e.g., cordless telephone, paging, trunking, etc.) (455/426) |
FOR242 | Roaming (455/432) |
FOR243 | Registration (455/435) |
FOR245 | Location monitoring (455/456) |
FOR246 | Radiotelephone equipment detail (455/550) |
FOR247 | Operable on more than one system (455/552) |
FOR249 | Remote private branch exchange (PBX) with wireless link to landline (455/554) |
FOR250 | Integrated with other device (e.g., electronic notebook, personal digital assistant, etc.) (455/556) |
FOR252 | Headgear (455/568) |
FOR253 | Hands-free or loudspeaking arrangement (455/569) |
FOR254 | Portable or mobile (455/575) |
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