| 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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| 07/25/1989 | US4852123 Nearly DC IF phase locked transceiver |
| 07/25/1989 | US4852121 Coherent pseudonoise code tracking loop |
| 07/25/1989 | US4852086 SSB communication system with FM data capability |
| 07/25/1989 | CA1257930A1 A-d encoder and d-a decoder system |
| 07/19/1989 | EP0324381A2 Automatic bypass |
| 07/19/1989 | EP0324284A1 Control device for domestic electrical equipment |
| 07/19/1989 | EP0324208A1 Method and circuit for switching between frequency-modulated high-frequency signals |
| 07/19/1989 | EP0323996A1 Oscillator network and quadrature network for radio receiver |
| 07/19/1989 | CN2041468U Three-purpose apparatus for charging, inverting and amplifying |
| 07/19/1989 | CN1034103A New method for suppression of local oscillator radiation of frequency modulated receiver |
| 07/18/1989 | US4850038 Frequency converter |
| 07/18/1989 | US4850036 Radio communication system using synchronous frequency hopping transmissions |
| 07/18/1989 | US4850034 Method and apparatus for installing a cellular telephone in a vehicle |
| 07/18/1989 | US4850031 Avalanche victim locating apparatus |
| 07/18/1989 | US4850030 Radio communication system for communicating between two stations upon automatic switching to an idle communication channel |
| 07/18/1989 | US4850006 Booster and charger unit used for hand-held portable telephone and having overheat protection circuit |
| 07/18/1989 | CA1257658A1 Interference cancellation system |
| 07/18/1989 | CA1257653A1 Radio communication system with power saving disablement prior to call handling processes |
| 07/13/1989 | WO1989006477A1 Communication receiver with automatic turn on/off |
| 07/13/1989 | WO1989006457A1 Control device for domestic electrical equipment |
| 07/13/1989 | DE3743732A1 Method for synchronising a code word with a received spread-spectrum signal |
| 07/13/1989 | DE3743731A1 Method and circuit arrangement for controlling the phase angle between a generated code and a received code contained in a received spread-spectrum signal |
| 07/13/1989 | DE3743730A1 Method for synchronising a code word with a received spread-spectrum signal |
| 07/12/1989 | EP0323614A2 Rotable contactless antenna coupler and antenna |
| 07/12/1989 | CN2041085U Coding multichannel wired intercom |
| 07/12/1989 | CN1004783B Antenna input circuit for receiver |
| 07/11/1989 | US4847862 Global positioning system course acquisition code receiver |
| 07/11/1989 | US4847861 Maximum length linearly occurring code sequence generator in a spread spectrum communication system |
| 07/11/1989 | US4847818 Wristwatch radiotelephone |
| 07/11/1989 | CA1257337A1 Frequency synthesizer for broadcast telephone system having multiple assignable frequency channels |
| 07/06/1989 | DE3806045C1 Electronic bridge circuit |
| 07/05/1989 | CN2040685U Adjusting frequency radio emitter |
| 07/05/1989 | CN1033723A Head band |
| 07/04/1989 | US4845772 Portable radiotelephone with control switch disabling |
| 07/04/1989 | US4845756 Apparatus for through-connecting audio signals |
| 07/04/1989 | US4845752 Multi-signal processor synchronized system |
| 07/04/1989 | US4845726 Maximum length linearly recurring sequence generator control device |
| 07/04/1989 | US4845441 Amplifier circuit with bipolar transistors |
| 07/04/1989 | US4845389 Very high frequency mixer |
| 07/04/1989 | CA1256946A1 Hidden preamble for frequency hopped synchronization |
| 07/04/1989 | CA1256945A1 Remote control system |
| 06/29/1989 | WO1989006074A1 Process and circuit arrangement for reversing frequency-modulated high-frequency signals |
| 06/29/1989 | WO1989006072A1 Television tuner |
| 06/29/1989 | WO1989005984A1 Process for adapting the frequency band of an oscillating circuit made from a metal-plastic-metal sandwich foil useful as an identification label, and sandwich foil for implementing the process |
| 06/29/1989 | WO1989005858A1 Cucumber mosaic virus coat protein gene |
| 06/29/1989 | DE3842272A1 Noise suppression device for an FM receiver |
| 06/29/1989 | DE3832454A1 Control method for an RDS receiver |
| 06/28/1989 | EP0321540A1 Apparatus for achieving a controllable line termination impedance |
| 06/27/1989 | US4843638 Receiver for frequency hopped signals |
| 06/27/1989 | US4843637 Tuner circuit |
| 06/27/1989 | US4843612 Method for jam-resistant communication transmission |
| 06/27/1989 | US4843289 Digital control bus system |
| 06/27/1989 | CA1256616A1 Capacity expander for telephone line |
| 06/27/1989 | CA1256526A1 Adaptive hybrid circuits for crosstalk cancellation |
| 06/27/1989 | CA1256504A1 Multi-mode modulation and demodulation system and method |
| 06/27/1989 | CA1256503A1 Modem for use in multipath communication system |
| 06/27/1989 | CA1256500A1 Universal remote control unit |
| 06/26/1989 | EP0305385A4 Digital zero if selectivity section. |
| 06/22/1989 | DE3831572A1 Radio data system receiver |
| 06/22/1989 | DE3741565A1 Method and arrangement for duplex telephoning |
| 06/21/1989 | EP0321173A1 A transimpedance pre-amplifier and a receiver including the pre-amplifier |
| 06/21/1989 | EP0321153A2 Cancelling circuit and transmission system |
| 06/21/1989 | EP0320883A2 FM receiving circuit |
| 06/20/1989 | US4841545 Synchronous tracking device for direct spread spectrum receiver |
| 06/20/1989 | US4841544 Digital direct sequence spread spectrum receiver |
| 06/20/1989 | US4841414 High frequency apparatus chassis and circuit board construction |
| 06/20/1989 | US4841368 Television customer control functions restorer |
| 06/20/1989 | US4841169 Dual-gate fet amplifier-mixer with intermediate ohmic island for rejecting a frequency band |
| 06/20/1989 | US4840448 Optical fiber transmission apparatus, in particular for submarine use |
| 06/20/1989 | US4840258 Brief case with a portable wireless telephone |
| 06/15/1989 | WO1989005549A1 Identification apparatus and methods |
| 06/15/1989 | WO1989005548A1 Receiver |
| 06/15/1989 | WO1989005543A1 A transimpedance pre-amplifier and a receiver including the pre-amplifier |
| 06/15/1989 | DE3817643C1 Arrangement for the suppression of interference signals in an adaptive antenna system |
| 06/14/1989 | EP0319973A2 Spread spectrum demodulating device for spread spectrum communication system |
| 06/14/1989 | EP0319782A2 Radio wave receiver with several antennas |
| 06/14/1989 | EP0319781A2 Portable transmitter for the electromagnetic transmission of coded pulses, and tuned receiver therefor |
| 06/14/1989 | CN2039481U Multi-functional modular and vehicular open transceiver |
| 06/14/1989 | CN1033434A Centroid decision circuit |
| 06/13/1989 | US4839923 Method and apparatus for time companding an analog signal |
| 06/13/1989 | US4839906 Processor based linked compressor-expander telecommunications system |
| 06/13/1989 | US4839645 Weather data transmitting system |
| 06/13/1989 | US4838377 Car electronic device having antitheft mechanism |
| 06/07/1989 | EP0319235A2 Communication and energy control system for houses |
| 06/07/1989 | EP0319211A2 Radio telephone apparatus |
| 06/07/1989 | EP0319174A2 Control circuit for the local oscillator of an optical homodyne or heterodyne receiver of a phase shift keying system |
| 06/07/1989 | EP0318911A2 Frame-interval fault detection in a demand assignment TDMA communication system |
| 06/07/1989 | EP0318548A1 Apparatus for electrically connecting two audio components utilizing different sized conductors |
| 06/07/1989 | EP0318478A1 Multiple resonator component-mountable filter. |
| 06/07/1989 | CN1033339A Bandwidth limiting circuit with variable bandwidth |
| 06/06/1989 | US4837854 Paging receiver having a noise-immune verification circuit for disabling battery saving operation |
| 06/06/1989 | US4837853 Dual port FM demodulation in phase locked receivers |
| 06/06/1989 | US4837827 Method for transmitting two independent types of information and device for implementing the method |
| 06/06/1989 | US4837823 Communication system |
| 06/06/1989 | US4837802 Radio communication method and system |
| 06/06/1989 | US4837786 Technique for mitigating rain fading in a satellite communications system using quadrature phase shift keying |
| 06/06/1989 | US4837627 Programmable operating-parameter control appatatus for a television receiver |
| 06/06/1989 | US4837580 Microwave landing system with fail-soft switching of dual transmitters, beam steering and sector antennas |
| 06/06/1989 | US4837522 Noise reducer for microwave amplifier |
| 06/06/1989 | CA1255361A1 Digital analysing and synthesizing filter bank with maximum sampling rate reduction |