| 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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| 05/22/1979 | US4156195 Receiver having a phase-locked loop |
| 05/22/1979 | US4156193 Crystalless scanning radio receiver and transmitter |
| 05/22/1979 | CA1055158A1 Magnetic recording apparatus |
| 05/15/1979 | US4155097 Method and arrangement for the redundancy-reducing coding of pictures |
| 05/15/1979 | US4155041 System for reducing noise transients |
| 05/15/1979 | US4155040 Frequency programmable RF communications |
| 05/15/1979 | US4155039 Two-way transmission system between a main station and secondary stations |
| 05/15/1979 | US4154980 Noise blanker with variable rate-shut-off and/or variable blanking threshold level |
| 05/15/1979 | CA1054681A1 Frequency stabilized single oscillator transceivers |
| 05/15/1979 | CA1054680A1 Transceiver having improved voice actuated carrier and echo suppression circuit |
| 05/08/1979 | US4153884 Frequency synthesizer for transmitter/receiver using a phase locked loop |
| 05/08/1979 | US4153879 Shock muting circuit for use in an AM receiver |
| 05/08/1979 | US4153878 Sectored antenna communications receiver with squelch circuit |
| 05/08/1979 | US4153877 Mobile CB transceiver |
| 05/08/1979 | US4153876 Charge transfer device radio system |
| 05/08/1979 | CA1054229A1 Listening control apparatus in a receiver |
| 05/01/1979 | US4152657 Echo suppression circuit |
| 05/01/1979 | US4152652 Apparatus for and method of measuring radio frequency signals |
| 05/01/1979 | US4152651 Method for detecting the code-phase coincidence in an SSMA receiver |
| 05/01/1979 | US4152650 Continuously-synchronized tracking receiver for a priori defined swept carriers |
| 05/01/1979 | US4152582 Compaction/expansion logic |
| 04/24/1979 | US4151475 Compensation circuit for multi-path propagation distortion in binary frequency modulated signals |
| 04/24/1979 | US4151471 System for reducing noise transients |
| 04/24/1979 | US4151469 Apparatus equipped with a transmitting and receiving station for generating, converting and transmitting signals |
| 04/24/1979 | US4151468 Microphone holder attachment and switch control therefor |
| 04/24/1979 | US4151467 Switched microphone hang-up bracket |
| 04/18/1979 | EP0001522A1 Electronic line equipment with two-wire-four-wire conversion circuit for telephone exchange |
| 04/17/1979 | US4150344 Tunable microwave oscillator |
| 04/10/1979 | US4149125 Frequency synthesizer for transmitter receiver using a phase locked loop |
| 04/10/1979 | US4149122 Wideband tracking generator for harmonic mixing receivers |
| 04/10/1979 | US4149121 Four phase to two phase correlator |
| 04/10/1979 | US4149043 Cassette tape recorder with radio receiver |
| 04/10/1979 | US4149039 Frequency band compression of FDM using time expansion |
| 04/10/1979 | CA1052447A2 Broadcast receiver |
| 04/05/1979 | WO1979000169A1 Television system scheduler |
| 04/05/1979 | WO1979000158A1 Electronic equipment for users,with two wires-four wires conversion circuit for a telephone switch center |
| 04/03/1979 | US4147986 AM-FM receiver |
| 04/03/1979 | US4147985 Low level modulation system for a radio transmitter |
| 04/03/1979 | US4147984 Dual digital processor transceiver |
| 04/03/1979 | US4147980 Redundant rf system for space application |
| 03/27/1979 | US4146842 Noise muting circuit in fm receiver |
| 03/27/1979 | US4146747 Fm stereo demodulating device |
| 03/27/1979 | CA1051567A1 Tuning system for am/fm receivers |
| 03/27/1979 | CA1051521A1 Vehicle safety and crime deterrent communication system |
| 03/20/1979 | US4145664 Audio signal compression and expansion system |
| 03/20/1979 | US4145657 Radio transmission system for two subscribers to have a mutual connection on one of several frequency channels and having time multiplex interlace of preferred channels |
| 03/20/1979 | US4145656 Transceiver capable of sensing a clear channel |
| 03/20/1979 | US4145655 Digitally transmitting transceiver |
| 03/20/1979 | CA1051100A1 Threshold gate having a variable threshold level |
| 03/20/1979 | CA1051094A1 Signal quality detector |
| 03/20/1979 | CA1050897A1 Noise tolerant receiver |
| 03/13/1979 | US4144547 Apparatus and method for encoding halftone and line copy data |
| 03/13/1979 | US4144500 Noise elimination for FM demodulators |
| 03/07/1979 | EP0000990A1 Unbalanced/balanced converter circuits |
| 03/06/1979 | US4143325 Constant amplitude interference squelch system |
| 03/06/1979 | US4143324 Transistorized superregenerative radio frequency detector |
| 03/06/1979 | CA1050158A1 Ghost signal erasing system |
| 03/06/1979 | CA1050120A1 Diode ring mixer |
| 03/06/1979 | CA1050119A1 Double quadrature fm receiver |
| 02/27/1979 | US4142155 Diversity system |
| 02/27/1979 | US4142075 Interface circuit and method for telephone extension lines |
| 02/27/1979 | US4142071 Quantizing process with dynamic allocation of the available bit resources and device for implementing said process |
| 02/27/1979 | CA1049616A1 Tone calling with single sideband radio equipment |
| 02/20/1979 | US4140980 Compensation circuit for trailing edge distortion of pulse-width modulated signal |
| 02/20/1979 | US4140975 Highly selective programmable filter module |
| 02/20/1979 | US4140960 Current control circuit |
| 02/20/1979 | US4140875 Four-wire, eight-leg bridge |
| 02/20/1979 | CA1049165A1 Electronic automatic frequency tuning system |
| 02/20/1979 | CA1049100A2 Three tone generator |
| 02/13/1979 | CA1048664A1 Radiotelephone system |
| 02/13/1979 | CA1048639A1 On-off system for television receivers |
| 02/13/1979 | CA1048631A1 Squelch circuit |
| 02/13/1979 | CA1048609A1 Am-fm receiver having improved bias supply circuit |
| 02/06/1979 | US4138646 Wideband absolute calibration system |
| 02/06/1979 | US4138645 Wideband signal calibration system |
| 02/06/1979 | CA1048108A1 Fm receiver with detector for multi-path reception |
| 01/30/1979 | US4137501 Noise suppression device |
| 01/30/1979 | US4137500 Frequency dependent amplitude modulated exciter apparatus |
| 01/30/1979 | US4137499 Signal strength measuring transceiver |
| 01/30/1979 | CA1047660A1 Receiver with voltage tunable tuned circuits |
| 01/30/1979 | CA1047659A1 Active hybrid circuit |
| 01/23/1979 | US4136344 Miniature receiving set with a pivotable stand |
| 01/23/1979 | US4136314 Adaptive signal weighting system |
| 01/23/1979 | US4136265 Hand-held microphone assembly |
| 01/23/1979 | CA1047181A1 Indicating circuit for an fm stereophonic signal receiver |
| 01/16/1979 | US4135164 Synchronous generating circuit devices with two phase-locked loops and feedback around both |
| 01/16/1979 | US4135159 Apparatus for suppressing a strong electrical signal |
| 01/16/1979 | US4135158 Universal automotive electronic radio |
| 01/09/1979 | US4134071 SSMA Data transmission system |
| 01/09/1979 | US4134070 Modular radio |
| 01/09/1979 | US4134068 Transmitter/receivers |
| 01/09/1979 | CA1046164A1 Electro-optical correlator |
| 01/02/1979 | US4132953 Squelch circuit for a radio receiver |
| 01/02/1979 | US4132952 Multi-band tuner with fixed broadband input filters |
| 01/02/1979 | US4132951 Digital processor controlled radio system |
| 01/02/1979 | US4132950 Clarifying radio receiver |
| 01/02/1979 | CA1045689A1 Phase locked loop for use with local oscillator |
| 01/02/1979 | CA1045684A1 Walkie-talkie device with a selectively actuable signal generator |
| 12/26/1978 | US4131851 Radio-signal receiver with plug-in modules |
| 12/26/1978 | US4131850 Single side band radio apparatus |