| Patents for H04B 1 - Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission (188,568) |
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| 01/21/1981 | EP0022561A1 Device for powering a subscriber set |
| 01/20/1981 | US4246617 Digital system for changing the rate of recorded speech |
| 01/20/1981 | US4246582 Full duplex transceiver comprising hybrid coil and automatic impedance adjustment means |
| 01/20/1981 | US4246541 System for removing interference distortion in the demodulated signal of a frequency-modulated signal |
| 01/20/1981 | US4246539 Frequency synthesizing system for AM·SSB transceiver |
| 01/20/1981 | US4246441 FM Receiver equipped with noise pulse supression device |
| 01/20/1981 | US4245872 Casing for electronic appliances |
| 01/20/1981 | CA1094174A1 Sampling filter-detector |
| 01/20/1981 | CA1094164A1 Radio signalling systems |
| 01/20/1981 | CA1094163A1 Ssb transceiver |
| 01/20/1981 | CA1094162A1 Traffic switching in communications satellites |
| 01/13/1981 | US4245352 Automated system for testing radio receivers |
| 01/13/1981 | US4245348 Center frequency tuning system for radio-frequency signal receiver |
| 01/13/1981 | US4245343 Automatic shunt device |
| 01/13/1981 | US4245326 Impulse autocorrelation function code generator |
| 01/13/1981 | CA1093666A1 Portable radio receiver with detachable speaker unit |
| 01/13/1981 | CA1093645A1 Radio receiver employing premixing and digital display |
| 01/13/1981 | CA1093643A1 Ssb transceiver |
| 01/07/1981 | EP0021872A1 High frequency circuit block for simultaneously transmitting and receiving, transmitter-receiver for millimeter waves and radar using such a circuit block |
| 01/07/1981 | EP0021762A1 Electronic tuning antenna system |
| 01/07/1981 | EP0021053A1 Communication equipment |
| 01/07/1981 | EP0020939A1 Method and device for guiding terrain vehicles |
| 01/07/1981 | EP0020640A1 High efficiency, light weight audio amplifier and power supply. |
| 01/06/1981 | US4244056 Noise reduction circuit |
| 01/06/1981 | US4243944 Circuit for automatic dynamic compression or expansion |
| 01/06/1981 | CA1093211A1 Tandem block digital processor for use with nonuniformly encoded digital data |
| 01/06/1981 | CA1093157A1 Radio transmitter display indicator |
| 01/06/1981 | CA1093126A1 Switch means for radio alarm device |
| 12/30/1980 | USRE30468 Signal compressors and expanders |
| 12/30/1980 | US4242756 Multiline switching protection apparatus |
| 12/30/1980 | US4242753 Radio transmitter time out timer |
| 12/30/1980 | US4242671 Transponders |
| 12/30/1980 | CA1092733A1 Multi-band tuner |
| 12/30/1980 | CA1092694A1 Charger/converter console with reel arrangement |
| 12/23/1980 | US4241452 Automatic frequency control system |
| 12/23/1980 | US4241450 Automatic turn-off apparatus for a radio or television receiver |
| 12/23/1980 | US4241330 Multiple-processor digital communication system |
| 12/23/1980 | US4241312 Self-calibrating threshold detector |
| 12/23/1980 | CA1092261A1 Two-way radio transmission system between a main station and secondary stations |
| 12/16/1980 | US4240034 Digital frequency synthesizer |
| 12/11/1980 | WO1980002782A1 Antenna low-noise q spoiling circuit |
| 12/10/1980 | EP0019878A1 Time-axis picture-signal converter for facsimile and the like |
| 12/10/1980 | EP0019630A1 Intermediate frequency sensing circuit |
| 12/09/1980 | US4238855 Parallel operation of multiple TV transmitters |
| 12/09/1980 | US4238850 Transmitter/receiver for single channel duplex communication system |
| 12/09/1980 | US4238771 Muting circuit |
| 12/09/1980 | US4238139 Panel assembly |
| 12/09/1980 | CA1091311A1 Power-dividing and modulating arrangement |
| 12/09/1980 | CA1091310A1 Pll synthesizer |
| 12/09/1980 | CA1091299A1 Phase locked loop exciter generator for high frequency transmitter |
| 12/02/1980 | US4237556 Superheterodyne receiver having distortion reducing circuitry |
| 12/02/1980 | US4237555 Automatic modulation system |
| 12/02/1980 | CA1090707A1 Adaptive filter for companding system |
| 11/26/1980 | EP0019084A1 Circuitry for reducing amplitude-dependent distortions in heterodyne receivers |
| 11/25/1980 | US4236256 Asynchronous data receiver |
| 11/25/1980 | US4236254 Radio receiver blanker inhibit circuit |
| 11/25/1980 | US4236252 Double-converting FM tuner |
| 11/25/1980 | US4236251 Frequency synthesizer receiver having memory for storing frequency data |
| 11/25/1980 | US4236250 Multiline switch |
| 11/25/1980 | US4236244 Digital communications transmission system |
| 11/25/1980 | CA1090425A1 Digital radio relay systems |
| 11/18/1980 | US4234965 Communication tuning system utilizing local oscillator frequency selection for maximum RF filter bandwidth and method thereof |
| 11/18/1980 | US4234962 Automatic AFT defeat circuit |
| 11/18/1980 | US4234930 Interleaved binary coded signal translation device |
| 11/18/1980 | US4234883 Noise adaptive correlator |
| 11/18/1980 | US4234761 Method of communicating digital speech data and a memory for storing such data |
| 11/18/1980 | CA1089934A1 Synchronized compressor and expander voice processing system for radio telephone |
| 11/12/1980 | EP0018940A1 Portable radio set with battery part separable from transceiver part |
| 11/12/1980 | EP0018782A1 Communication system with digital signal/noise ratio amplifier apparatus |
| 11/12/1980 | EP0018716A2 Noise blanker which tracks average noise level |
| 11/12/1980 | EP0018570A1 Circuit for suppressing interference signals |
| 11/11/1980 | US4233686 Radio tuner for coupling with tape recorder |
| 11/11/1980 | US4233685 Radio for receiving and reproducing information broadcast on the intermediate frequency |
| 11/11/1980 | CA1089538A2 Universal automotive electronic radio |
| 11/04/1980 | US4232398 Radio receiver alignment indicator |
| 11/04/1980 | US4232394 Station-signal frequency indication system for radio receiver |
| 11/04/1980 | US4232393 Muting arrangement of a radio receiver with a phase-locked loop frequency synthesizer |
| 11/04/1980 | US4232391 Vessel location system |
| 11/04/1980 | US4232390 Mobile radio vehicle control system |
| 11/04/1980 | US4232318 Duplex microwave radio communication system |
| 11/04/1980 | US4232301 Apparatus for automatically selectively displaying information of a plurality of kinds |
| 11/04/1980 | US4232206 Signal transmission control system |
| 11/04/1980 | US4232191 FM Receiving device |
| 11/04/1980 | US4232189 AM Stereo receivers |
| 11/04/1980 | US4231446 Resonating chamber |
| 11/04/1980 | CA1089018A1 Digital tone generator for use with radio transmitters and the like |
| 10/29/1980 | EP0018256A1 Transceiver with automatic switch-over control, and telecommunications network comprising such a transceiver |
| 10/28/1980 | US4231116 Radio station system |
| 10/28/1980 | US4231094 Method and device for determining the phase intercept in a system employing phase-shift keying modulation |
| 10/28/1980 | US4231019 Remote control arrangement for a medical appliance |
| 10/28/1980 | US4231015 Multiple-processor digital communication system |
| 10/28/1980 | CA1088631A2 Adaptive audio compressor |
| 10/28/1980 | CA1088630A1 Diverstity system |
| 10/21/1980 | US4229827 Single voltage controlled oscillator modem |
| 10/15/1980 | EP0017343A1 Radio frequency generators |
| 10/15/1980 | EP0017130A1 Receiver for high-frequency, electromagnetic waves with frequency adjustment |
| 10/14/1980 | US4228546 AM Radio receiver |
| 10/14/1980 | US4228545 Receiver device having a function for suppressing transient noises during abrupt interruptions |
| 10/14/1980 | US4228544 Antenna system using antenna base impedance transforming means |
| 10/14/1980 | US4228542 Digital tuning FM stereophonic receiver including phase locked loop synthesizer |