| 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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| 01/26/1982 | US4313212 Electrical circuit arrangements, for example for use with communications receivers |
| 01/26/1982 | US4313211 Single sideband receiver with pilot-based feed forward correction for motion-induced distortion |
| 01/26/1982 | US4313194 Transmission system of frequency division multiplex signals on digital links |
| 01/26/1982 | CA1117188A1 Thermally responsive power control for a radio transmitter |
| 01/21/1982 | WO1982000230A1 Arrangement for adjusting an adaptive digital balance filter included in a subscriber unit |
| 01/21/1982 | WO1982000226A1 Transform modulation system |
| 01/20/1982 | EP0044216A1 Magnetic reproducing apparatus capable of receiving radio broadcast programmes and a tuner unit insertable in magnetic reproducing apparatus |
| 01/19/1982 | US4311877 Method and means for improving the reliability of systems that transmit relatively wideband signals over two or more relatively narrowband transmission circuits |
| 01/19/1982 | US4311876 Route guidance system for roadway vehicles |
| 01/19/1982 | CA1116700A2 Narrow band communication system |
| 01/19/1982 | CA1116698A1 Duplex transmitting-receiving station |
| 01/12/1982 | US4310924 Channel programming apparatus for a signal receiver |
| 01/12/1982 | US4310923 Two-way transceiver including frequency synthesizer |
| 01/12/1982 | US4310721 Half duplex integral vocoder modem system |
| 01/12/1982 | CA1116326A1 Tuner with peaking and trap circuits |
| 01/12/1982 | CA1116253A1 Combiner system |
| 01/12/1982 | CA1116241A1 Radio broadcasting system with code signaling |
| 01/12/1982 | CA1116239A1 Two-way voice controlled communication system |
| 01/06/1982 | EP0042878A1 Device for monitoring an amplifier stage |
| 01/05/1982 | US4309769 Method and apparatus for processing spread spectrum signals |
| 01/05/1982 | US4309676 Instantaneous compressor and instantaneous expandor |
| 01/05/1982 | US4309656 Level indicating circuit |
| 01/05/1982 | CA1115869A1 Subscriber electronic equipment with two wire - four wire conversion circuit for telephone exchange |
| 01/05/1982 | CA1115868A1 Method and apparatus for improving telephone hybrid network |
| 01/05/1982 | CA1115641A1 System for reducing noise transients |
| 12/30/1981 | EP0042600A2 Entertainment electronics apparatus with a programme control unit for preselection of parts of radio and/or television programmes |
| 12/29/1981 | US4308621 Radio interference bucker apparatus |
| 12/29/1981 | US4308620 System for maintaining phase coincidence between a carrier wave and sidebands produced by a transmitter |
| 12/29/1981 | US4308614 Noise-reduction sampling system |
| 12/29/1981 | US4308613 Simplex, party-line electromagnetic data packet transmission system with a self seeking alternate routing capability |
| 12/29/1981 | CA1115347A1 Grounded rf power amplifier circuit apparatus |
| 12/24/1981 | WO1981003728A1 Subscriber line audio processing circuit apparatus |
| 12/24/1981 | WO1981003727A1 Wideband transceiver with emi suppression |
| 12/24/1981 | WO1981003713A1 Remote control entertainment system |
| 12/22/1981 | CA1114906A1 Undesired signal canceller |
| 12/22/1981 | CA1114904A1 Narrow band communication system |
| 12/15/1981 | US4306309 Memory control circuit for a television receiver |
| 12/15/1981 | US4306294 Combined electronic calculator and electronically tuning radio receiver |
| 12/15/1981 | US4306256 Preemphasis and clipping apparatus for reducing distortions |
| 12/15/1981 | US4306249 Digital signal processing method and apparatus |
| 12/15/1981 | US4306201 Signal processing circuit |
| 12/15/1981 | US4306200 Selective amplifier |
| 12/15/1981 | US4306112 Stereophonic receiver noise eliminating device |
| 12/09/1981 | EP0041310A1 An electronic circuit for signal compression and expansion |
| 12/09/1981 | EP0041289A1 An improved transceiver |
| 12/08/1981 | US4305158 Television tuner |
| 12/08/1981 | US4305157 Tuning circuit using a phase-locked loop |
| 12/08/1981 | US4305156 Rotary switch type television tuner |
| 12/08/1981 | US4305154 Transceiver |
| 12/08/1981 | US4305091 Electronic noise reducing apparatus and method |
| 12/08/1981 | US4305042 Circuit for compensating for discontinuity of a noise cancelled signal |
| 12/08/1981 | CA1114023A1 Microwave input circuit with parametric down converter |
| 12/08/1981 | CA1114022A1 Radio receiver alignment indicator |
| 12/02/1981 | EP0040785A1 Transformerless hybrid circuit |
| 12/01/1981 | US4304004 Apparatus for transmission and reception of frequency modulated digital communication signals |
| 12/01/1981 | US4303952 Recording and reproducing system |
| 12/01/1981 | CA1113571A1 Multiple-processor digital communication system |
| 12/01/1981 | CA1113545A1 Simulcast transmission system having phase-locked remote transmitters |
| 12/01/1981 | CA1113402A1 Apparatus and method for encoding halftone and line copy data |
| 11/25/1981 | EP0040544A2 Coded information arrangement |
| 11/24/1981 | US4302636 Subscriber's electronic line equipment comprising a two-wire-four-wire conversion circuit for a telephone exchange |
| 11/24/1981 | US4302631 Decimator apparatus for decreasing the word rate of a digital signal of the type employed in digital telephone systems |
| 11/24/1981 | CA1113155A1 Duplex microwave radio system |
| 11/17/1981 | US4301542 Remote control of appliances |
| 11/17/1981 | US4301541 Noise eliminating circuit |
| 11/17/1981 | US4301537 Means and method for maintaining synchronization of a spread spectrum or other receiver clock |
| 11/17/1981 | US4301336 Hybrid circuit |
| 11/17/1981 | CA1112767A1 Digital frequency synthesizer |
| 11/17/1981 | CA1112724A1 Apparatus for receiving signals in plural frequency bands |
| 11/10/1981 | US4300238 Control assembly for electronic tuning receivers |
| 11/10/1981 | US4300237 Single sideband modulation |
| 11/10/1981 | US4300235 Communications systems |
| 11/10/1981 | US4300104 Automatic gain control circuit for a noise pulse canceller |
| 11/10/1981 | US4300087 Portable, rechargeable power supply |
| 11/10/1981 | US4300023 Hybrid circuit |
| 11/10/1981 | US4300020 Method and apparatus for eliminating pilot signal components from stereo demodulated signals |
| 11/10/1981 | US4299344 Mount for portable radio communication unit |
| 11/04/1981 | EP0039275A1 Combined synthesis and demodulation device for a receiver of frequency-modulated waves, and receiver comprising it |
| 11/04/1981 | EP0038874A1 Radio apparatus or record player provided with electrical plugs on the back side |
| 11/03/1981 | US4298989 Tuning apparatus |
| 11/03/1981 | US4298895 Visual image noise eliminating system |
| 11/03/1981 | US4298841 Signal envelope detecting system |
| 10/28/1981 | EP0038580A1 Radio apparatus with a programmable memory for controlling transmitting and receiving channels |
| 10/27/1981 | US4297536 Self-adjusting hybrid network |
| 10/27/1981 | US4297531 Circuit for suppressing noise influences in the evaluation of signal states on transmission lines |
| 10/27/1981 | US4297527 Input gain adjusting apparatus and method |
| 10/27/1981 | CA1111589A1 Direct coupled transformerless hybrid |
| 10/27/1981 | CA1111499A1 Noise blanker with variable rate-shut-off and/or variable blanking threshold level |
| 10/21/1981 | EP0038161A1 2,6-Diaminonebularines, their production and use |
| 10/15/1981 | WO1981002942A1 Predictive signals coding with partitioned quantization |
| 10/14/1981 | EP0037518A1 Transformerless hybrid circuit |
| 10/13/1981 | US4295223 Digital signal/noise ratio amplifier apparatus for a communication system |
| 10/13/1981 | CA1110768A1 Method and apparatus for removing room reverberation |
| 10/13/1981 | CA1110707A1 Method for automatically matching a radio frequency transmitter to an antenna |
| 10/13/1981 | CA1110705A1 Radio transmitter time out timer |
| 10/13/1981 | CA1110704A2 Level control circuitry for two way communication system |
| 10/07/1981 | EP0037212A2 Methods and apparatuses for concealing error sample signals in digital television signals |
| 10/06/1981 | US4293736 Noise eliminator for radio receiver |
| 10/06/1981 | CA1110372A1 Tuning apparatus |
| 10/06/1981 | CA1110356A1 Mesfet device surface-wave-device channel selector |