| 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) |
|---|
| 06/02/1981 | US4271533 AFC Interface circuit |
| 06/02/1981 | US4271530 Receiver having a frequency synthesizing circuit |
| 06/02/1981 | US4271501 Splitter/combiner network |
| 06/02/1981 | US4271500 Device for converting a non-uniformly sampled signal with short-time spectrum to a uniformly sampled signal |
| 06/02/1981 | US4271499 Method and apparatus for digitally implementing a linked compressor-expander telecommunications system |
| 06/02/1981 | US4271432 Power supply control apparatus for a television receiver |
| 06/02/1981 | US4271403 Coaxial cable switching circuit |
| 06/02/1981 | US4271331 Analog processing system for real-time conversion of the frequency of analog signals |
| 06/02/1981 | CA1102413A1 Radio station system |
| 05/27/1981 | EP0029027A1 Antenna low-noise q spoiling circuit. |
| 05/26/1981 | US4270226 Remote control system |
| 05/26/1981 | US4270225 Electrical apparatus comprising a reversible front plate |
| 05/26/1981 | US4270223 Signal normalizer |
| 05/26/1981 | US4270213 Sequential channel selector system |
| 05/26/1981 | US4270148 Facsimile transmission apparatus |
| 05/19/1981 | US4268916 Frequency converting circuit |
| 05/19/1981 | US4268915 Universal automotive electronic radio with display for tuning or time information |
| 05/19/1981 | US4268914 Receiving apparatus for messages with in-band signals |
| 05/19/1981 | CA1101559A1 Radio coupled devices for detecting and analyzing weak transmissions within crowded frequency bands and operating systems responsively thereto |
| 05/12/1981 | US4267605 Interference eliminator in communication receiver |
| 05/12/1981 | US4267604 UHF electronic tuner |
| 05/12/1981 | US4267603 Memory control circuit |
| 05/12/1981 | US4267599 Antenna tuning system |
| 05/12/1981 | US4267597 Marine telephone radio |
| 05/12/1981 | US4267407 Method and apparatus for the transmission of speech signals |
| 05/12/1981 | CA1101141A1 Planar printed circuit board arrangement useful in the uhf portion of a television tuner |
| 05/12/1981 | CA1101074A1 System for transmitting service communications |
| 05/06/1981 | EP0028100A1 Tuning control apparatus for a receiver |
| 05/05/1981 | US4266296 Multipath distortion compensation circuit and method |
| 05/05/1981 | US4266202 Receiver protector having means for suppressing internally generated noise signal frequencies |
| 04/28/1981 | US4264981 Circuit arrangement for compensating the change in input capacitance at a first gate electrode of a dual-gate MOS field-effect transistor |
| 04/28/1981 | US4264979 Display device for CB radio |
| 04/28/1981 | US4264863 Pulse swallow type programmable frequency dividing circuit |
| 04/22/1981 | EP0027413A1 System for the simultaneous integral multiple-access transmission over optical fibre transmission lines |
| 04/22/1981 | EP0027233A1 Coding method for analog signals |
| 04/21/1981 | US4263676 RF amplifying system having image rejection |
| 04/16/1981 | WO1981001087A1 Adaptive cross-polarization interference cancellation arrangements |
| 04/15/1981 | EP0026924A1 Adaptive cross-polarization interference cancellation arrangements |
| 04/14/1981 | US4262361 Variable bandwidth filtering and frequency converting system |
| 04/14/1981 | US4262360 Method and device for detecting a pseudo-random sequence of carrier phase changes of 0° and 180° in a data receiver |
| 04/14/1981 | US4262264 Apparatus and method for achieving acquisition and maintaining lock in a phase locked loop |
| 04/14/1981 | CA1099343A1 Frequency converter |
| 04/08/1981 | EP0026500A1 Simplex radio communication system with control of the communication direction from a single station |
| 04/07/1981 | CA1099012A1 Electrical signal separating device |
| 04/07/1981 | CA1098974A1 Multiplexing and dividing circuit |
| 04/02/1981 | WO1981000942A1 Transmitter having a phase-locked loop |
| 04/01/1981 | EP0025876A1 Multichannel radiotelephone equipment |
| 03/31/1981 | US4259740 Sequential detection system |
| 03/31/1981 | US4259644 Local oscillator for multi-band reception having single crystal reference oscillator |
| 03/24/1981 | US4258341 Feed forward passive coupling system and method |
| 03/24/1981 | US4258329 Noise suppression system |
| 03/17/1981 | US4257121 Portable transceiver |
| 03/17/1981 | US4256975 Limiter circuit for removing nose from demodulated signals |
| 03/17/1981 | CA1097830A1 Frequency synthesizer tuning system with signal seek |
| 03/17/1981 | CA1097792A1 Gray scale interpolation technique |
| 03/17/1981 | CA1097742A1 Single sideband transceiver |
| 03/13/1981 | EP0020640A4 High efficiency, light weight audio amplifier and power supply. |
| 03/11/1981 | EP0024878A1 Phase-locked loop circuit |
| 03/11/1981 | EP0024763A1 Converter circuit for television signals |
| 03/10/1981 | US4255816 Receiving apparatus having a plurality of antennas |
| 03/10/1981 | US4255791 Signal processing system |
| 03/10/1981 | US4255620 Method and apparatus for bandwidth reduction |
| 03/05/1981 | WO1981000654A1 Housing for electronic apparatus with elastomer outer layer |
| 03/03/1981 | US4254505 Normalization method and apparatus used when quantitatively measuring the reception quality of a received frequency-modulated ultrashort-wave signal |
| 03/03/1981 | US4254504 Control apparatus for a transceiver employing a programmable memory |
| 03/03/1981 | US4254503 Radio receiver for tone modulated signals |
| 03/03/1981 | CA1096952A1 Feedbackward distortion compensating circuit |
| 03/03/1981 | CA1096945A1 Solid state power combiner |
| 03/03/1981 | CA1096944A1 Method and system of conveying information |
| 02/24/1981 | US4253195 FM-Receiver comprising a search tuning system |
| 02/24/1981 | US4253194 Receiver including a tuning circuit having a transmitter search |
| 02/24/1981 | US4253072 Compandor with sampling and equalization |
| 02/24/1981 | US4253067 Baseband differentially phase encoded radio signal detector |
| 02/24/1981 | CA1096522A1 Subscriber line-trunk circuit |
| 02/24/1981 | CA1096519A1 Phase locked loop tuning system with a preset channel memory |
| 02/24/1981 | CA1096447A1 Radio receiver |
| 02/19/1981 | WO1981000495A1 Single sideband receiver with pilot-based feed forward correction for motion-induced distortion |
| 02/17/1981 | US4251690 Frequency-modulation stereophonic receiver |
| 02/11/1981 | EP0023511A1 Process and device for detecting and interpreting a distress signal. |
| 02/10/1981 | US4250472 Undesired signal canceller |
| 02/10/1981 | US4250470 Syllabic compander with logarithmic chain |
| 02/10/1981 | CA1095593A1 Active filter |
| 02/10/1981 | CA1095592A1 Antenna switch |
| 02/04/1981 | EP0023275A1 Simplex-transmitter-receiver |
| 02/04/1981 | EP0023223A1 Modified vestigial side band transmission system |
| 02/03/1981 | US4249262 Tunable microwave oscillator |
| 02/03/1981 | US4249261 Superheterodyne radio receiver with nearby-station interference detection |
| 02/03/1981 | US4249260 Noise-reducing apparatus |
| 02/03/1981 | US4249257 Radio frequency signals analyzer |
| 02/03/1981 | US4249165 Digital radio pager |
| 02/03/1981 | CA1095194A1 Phase locked loop television tuning system |
| 02/03/1981 | CA1095128A1 Integrated front end circuit for vhf receiver |
| 02/03/1981 | CA1095127A1 Radio-signal receiver with plug-in modules |
| 01/27/1981 | US4247952 Signal receiving apparatus |
| 01/27/1981 | US4247951 Frequency synthesizer with unauthorized frequency inhibiting means |
| 01/27/1981 | US4247948 Automatic modulation control in transmitter |
| 01/27/1981 | US4247947 Mobile radio data communication system |
| 01/27/1981 | US4247939 Spread spectrum detector |
| 01/27/1981 | US4247850 Visor and garage door operator assembly |
| 01/27/1981 | CA1094642A1 Automatic radiotelephone system |