Telecommunications Patents (Class 455)
- Emergency or alarm communication (Class 455/404.1)
- Usage measurement (Class 455/405)
- Security or fraud prevention (Class 455/410)
- Message storage or retrieval (Class 455/412.1)
- Special service (Class 455/414.1)
- Programming control (Class 455/418)
- Out-of-range indication (Class 455/421)
- Zoned or cellular telephone system (Class 455/422.1)
- Including personal numbering system (i.e., intelligent network for subscriber tracking or follow-me subscriber feature) (Class 455/461)
- Including private cordless extension system (Class 455/462)
- Including public cordless extension system (Class 455/465)
- Auxiliary data signaling (e.g., short message service (SMS)) (Class 455/466)
- Failure compensation (e.g., spare channel) (Class 455/8)
- Monitoring (Class 455/9)
- Portable or mobile repeater (Class 455/11.1)
- With transmission line (Class 455/14)
- Two separate way transmission (Class 455/15)
- Plural modulated carriers (Class 455/17)
- With delay or recording (Class 455/18)
- Common antenna (Class 455/19)
- With frequency conversion (Class 455/20)
- Frequency or phase modulation (Class 455/23)
- Transmitter/receiver feedback compensation (Class 455/24)
- Directive antenna (Class 455/25)
- Earth or water medium (Class 455/40)
- Near field (i.e., inductive or capacitive coupling) (Class 455/41.1)
- Short range RF communication (Class 455/41.2)
- Frequency or phase modulation (Class 455/42)
- Suppressed carrier wave system (Class 455/46)
- Single or vestigial sideband system (Class 455/47)
- Inverted sideband (Class 455/48)
- Plural transmitters or receivers (i.e., more than two stations) (Class 455/500)
- Single message via plural carrier wave transmission (Class 455/59)
- Single message via plural modulation of single carrier (Class 455/61)
- Optimum frequency selection (Class 455/62)
- Distortion, noise, or other interference prevention, reduction, or compensation (Class 455/63.1)
- Having diverse art device (Class 455/66.1)
- Having measuring, testing, or monitoring of system or part (Class 455/67.11)
- With control signal (Class 455/68)
- Convertible (e.g., to diverse art device) (Class 455/74)
- With frequency stabilization (e.g., automatic frequency control) (Class 455/75)
- With tuning (Class 455/77)
- With transmitter-receiver switching or interaction prevention (Class 455/78)
- With a common signal processing stage (Class 455/84)
- Transceiver controlling a separate transceiver or receiver (Class 455/88)
- Radiotelephone equipment detail (Class 455/550.1)
- Having particular application (e.g., avalanche victim assistance) of a transceiver (Class 455/90.1)
- Having particular configuration (e.g., C.B., or walkie-talkie) of a transceiver (Class 455/90.2)
- Having particular housing or support of a transceiver (Class 455/90.3)
- Remote control of a transmitter (Class 455/92)
- Convertible to different type (e.g., AM to FM) (Class 455/93)
- Alternator (Class 455/94)
- Mobile or portable (Class 455/95)
- Diversity (Class 455/101)
- Plural modulation (Class 455/102)
- Plural separate transmitters or channels (Class 455/103)
- Modulation by absorption, shielding, or reflecting (Class 455/106)
- With variation of antenna impedance or dimension for modulation (Class 455/107)
- Amplitude modulation (Class 455/108)
- Angle modulation (Class 455/110)
- Having harmonic radiation suppression (Class 455/114.1)
- Noise or interference elimination (Class 455/114.2)
- Measuring, testing, or monitoring of transmitter (Class 455/115.1)
- Carrier amplitude control (e.g., voice operated on/off) (Class 455/116)
- With electrical protection of transmitter circuit or operator (Class 455/117)
- Frequency conversion (Class 455/118)
- Carrier frequency stabilization (Class 455/119)
- Including tuning (Class 455/120)
- With feedback of modulated output signal (Class 455/126)
- Power control, power supply, or bias voltage supply (Class 455/127.1)
- With casing or housing (Class 455/128)
- With coupled antenna (Class 455/129)
- Frequency conversion between signal source (e.g., wave collector) and receiver (Class 455/131)
- Plural receivers (Class 455/132)
- Convertible to different type (e.g., AM to FM) (Class 455/142)
- Panoramic display (Class 455/145)
- Plural output (e.g., plural speakers) (not stereo) (Class 455/149)
- Signal selection based on frequency (e.g., tuning) (Class 455/150.1)
- Exalted carrier (Class 455/201)
- Suppressed carrier (Class 455/202)
- Carrier and single sideband (Class 455/203)
- Vestigial sideband (Class 455/204)
- Frequency or phase modulation (Class 455/205)
- With protection circuit for receiver circuit (Class 455/217)
- Squelch (Class 455/218)
- Measuring or testing of receiver (Class 455/226.1)
- Responsive to an input signal of particular predetermined frequency (Class 455/227)
- Local control of receiver operation (Class 455/230)
- With wave collector (e.g., antenna) (Class 455/269)
- Modulation distortion or cross talk correction or elimination (Class 455/295)
- Noise or interference elimination (Class 455/296)
- Frequency modifying or conversion (Class 455/313)
- With particular receiver circuit (Class 455/334)
- Combined with diverse art device (Class 455/344)
- Cabinet, housing, or chassis structure (Class 455/347)
- Remote control of receiver (Class 455/352)
Foreign Patent Art Collections
- Receiver for satellite broadcast (455/3.2) (Class 455/FOR215)
- Combined with power distribution network (455/3.3) (Class 455/FOR216)
- Remote control of distribution (455/4.1) (Class 455/FOR217)
- Two-way (455/5.1) (Class 455/FOR219)
- Common antenna or cable (455/6.1) (Class 455/FOR220)
- Combined with diverse art device (e.g., audio/sound or entertainment systems) (455/6.3) (Class 455/FOR222)
- Near field (e.g., inductive or capacitive coupling) (455/41) (Class 455/FOR223)
- Distortion, noise, or other interference prevention, reduction, or compensation (455/63) (Class 455/FOR224)
- With diverse art device (455/66) (Class 455/FOR225)
- With measuring, testing, or monitoring of system or part (455/67.1) (Class 455/FOR226)
- Housing or support (455/90) (Class 455/FOR232)
- With harmonic radiation suppression (455/114) (Class 455/FOR233)
- Measuring, testing, or monitoring of transmitter (455/115) (Class 455/FOR234)
- Power or bias voltage supply (455/127) (Class 455/FOR235)
- Emergency or alarm communication (455/404) (Class 455/FOR237)
- Message storage or retrieval (455/412) (Class 455/FOR238)
- Special service (455/414) (Class 455/FOR239)
- Zoned or cellular telephone system (455/422) (Class 455/FOR240)
- Radiotelephone equipment detail (455/550) (Class 455/FOR246)
- Portable or mobile (455/575) (Class 455/FOR254)
