| 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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| 06/02/1987 | USH288 Interference cancelling transmitter |
| 06/02/1987 | US4670889 Frequency control for point to multipoint radio |
| 06/02/1987 | US4670885 Spread spectrum adaptive antenna interference canceller |
| 06/02/1987 | US4670870 Adaptive cancellation bridge circuit |
| 05/27/1987 | EP0223311A2 Remote control system |
| 05/27/1987 | EP0223307A2 Universal remote control unit with model indentification capability |
| 05/27/1987 | EP0223289A2 Improvements to pin diode attenuators |
| 05/27/1987 | EP0222854A1 Telecontrol unit for leisure electronic apparatuses. |
| 05/27/1987 | CN86108008A Universal remote control unit with model identification capability |
| 05/26/1987 | US4669119 FM stereo receiver |
| 05/26/1987 | US4669115 Hybrid circuit and method |
| 05/26/1987 | US4669091 Adaptive multipath distortion equalizer |
| 05/26/1987 | US4669089 Suppressed clock pulse-duration modulator for direct sequence spread spectrum transmission systems |
| 05/26/1987 | US4668988 Non-linear digital emphasis circuit |
| 05/26/1987 | US4668882 Radio frequency signal variable attenuation circuit |
| 05/21/1987 | WO1987003128A1 Analog signal encoding and decoding apparatus and methods |
| 05/21/1987 | DE3540380A1 Superheterodyne receiver circuit for an electrical radio clock |
| 05/20/1987 | CN86105333A 数字射频接收机 Digital RF Receiver |
| 05/20/1987 | CN86104796A Digital mixing apparatus |
| 05/19/1987 | US4667342 Tunable receiver input circuit |
| 05/19/1987 | US4667340 Voice messaging system with pitch-congruent baseband coding |
| 05/19/1987 | US4667225 Noise reduction circuit for composite color video signals |
| 05/13/1987 | EP0221476A2 Television interference-compensation apparatus for phase and amplitude compensation |
| 05/13/1987 | EP0221475A2 An apparatus for cancelling television fading interference |
| 05/13/1987 | EP0221189A1 Electronically tunable fm receiver |
| 05/13/1987 | EP0207948A4 Internally register-modelled, serially-bussed radio system. |
| 05/13/1987 | EP0132272B1 Telecommunication terminal |
| 05/13/1987 | CN86205373U Automatic cut-off conversion and alarm device for telecommunication line |
| 05/13/1987 | CN86103571A Multistation information transmission system |
| 05/12/1987 | US4665534 Method of and apparatus for determining time origin of timer for modem |
| 05/12/1987 | CA1221779A1 Channel selector |
| 05/07/1987 | WO1987002848A1 Portable radio battery pack with on-off switch |
| 05/07/1987 | WO1987002847A1 Portable two way radio with split universal device connector apparatus |
| 05/07/1987 | WO1987002843A1 Multi-level power amplifying circuitry for portable radio transceivers |
| 05/07/1987 | WO1987002842A1 Frequency doubling oscillator and mixer circuit |
| 05/06/1987 | EP0220914A1 Balanced oscillator and heterodyne circuit incorporating same |
| 05/06/1987 | EP0220867A2 Apparatus for receiving satellite broadcast signals |
| 05/05/1987 | US4663765 Data muting method and apparatus for audo-digital communications systems |
| 05/05/1987 | US4663624 Pager having receiving frame tuned by transducer |
| 04/29/1987 | EP0219665A2 Audio apparatus combination for a motor vehicle |
| 04/29/1987 | EP0219559A1 Mobile radio system for the transmission of digital as well as analogous signals |
| 04/28/1987 | US4661995 Multi-superheterodyne receiver |
| 04/28/1987 | US4661994 Frequency and volume display for a receiver |
| 04/28/1987 | US4661992 Switchless external antenna connector for portable radios |
| 04/28/1987 | US4661970 Cordless telephone system |
| 04/28/1987 | US4660792 Holder for VCR and TV remote controls |
| 04/22/1987 | EP0219085A2 A spread spectrum wireless PBX |
| 04/21/1987 | US4660216 Transmission system for the transmission of data signals in a modulation band |
| 04/21/1987 | US4660164 Multiplexed digital correlator |
| 04/21/1987 | US4660042 Cancellation system for transmitter interference with nearby receiver |
| 04/21/1987 | US4660005 High frequency electrical network |
| 04/21/1987 | US4660003 Device for limiting the power transmission of radiowave transmitters |
| 04/16/1987 | DE3536384A1 FM radio system for encrypted transmission of speech signals |
| 04/16/1987 | DE3536373A1 Radio device with pre-emphasiser/de-emphasiser for encrypted transmission of speech signals |
| 04/15/1987 | EP0217952A1 Fm receiver |
| 04/15/1987 | CN85107396A Automatic frequency controlling system used in frequency modulator or demoduclator |
| 04/15/1987 | CN85107392A Channel switching system for use in a radio digital transmission system |
| 04/14/1987 | US4658438 Receiver for satellite broadcasting service |
| 04/14/1987 | US4658437 Tuning voltage tracking arrangement |
| 04/14/1987 | US4658423 FM-stereo receiver |
| 04/14/1987 | CA1220546A1 Homotropic antenna system for portable radio |
| 04/14/1987 | CA1220527A1 Fm stereophonic system incorporating companding of difference signal |
| 04/09/1987 | WO1987002206A1 Rapid frequency-hopping time synchronization |
| 04/09/1987 | DE3535715A1 Method of conveying exhibit-specific information |
| 04/08/1987 | EP0217490A1 Communications system with protection switching using channel identities and individual selectors |
| 04/08/1987 | EP0217475A1 Receiver including a multipath transmission detector |
| 04/08/1987 | EP0217017A2 Signal coding process and system for implementing said process |
| 04/08/1987 | EP0216974A1 Code division multiplexer using direct sequence spread spectrum signal processing. |
| 04/08/1987 | EP0216803A1 Digital zero-if selectivity section. |
| 04/08/1987 | CN85109755A Extrema coding digitizing signal processing method and apparatus |
| 04/07/1987 | US4656645 Radio communication system |
| 04/07/1987 | US4656642 Spread-spectrum detection system for a multi-element antenna |
| 04/07/1987 | CA1220290A1 Power saving system for time-division multiple access radiocommunication network |
| 04/01/1987 | EP0216584A2 Frequency-dividing transponder and use thereof in a presence detection system |
| 04/01/1987 | EP0216389A2 High frequency filter assembly for electric instrument |
| 04/01/1987 | EP0216353A2 Method and apparatus for backing up data transmission system |
| 04/01/1987 | EP0215873A1 Assembly of devices enabling to make polyvalent the utilization of car radio equipment of all makes |
| 04/01/1987 | CN86104896A Switch dividing device for common reception |
| 03/31/1987 | US4654891 Optical communication of video information with distortion correction |
| 03/31/1987 | US4654888 Image suppression mixer of the waveguide type |
| 03/31/1987 | US4654884 Radio receiver with switching circuit for elimination of intermodulation interference |
| 03/31/1987 | US4654883 Radio transmitter and receiver device having a headset with speaker and microphone |
| 03/31/1987 | US4654882 Radio communication device and method of controlling transmitter output power |
| 03/31/1987 | US4654864 Phase synchronizing circuit |
| 03/31/1987 | US4654859 Frequency synthesizer for frequency hopping communication system |
| 03/31/1987 | US4654484 Video compression/expansion system |
| 03/31/1987 | CA1219978A1 Digital radio relay equipment |
| 03/31/1987 | CA1219932A1 Variable frequency rf electronic surveillance system |
| 03/31/1987 | CA1219810A2 Audio compressors and expanders |
| 03/31/1987 | CA1219809A2 Audio compressors and expanders |
| 03/26/1987 | DE3631640A1 Car stereo receiver |
| 03/25/1987 | EP0215442A1 Portable video and audio equipment holder for use in an automobile |
| 03/25/1987 | EP0215373A2 Method and arrangement for estimating the phase deviation, as well as a phase control method, in an optical synchronous receiver |
| 03/25/1987 | CN85106644A Receiver for expanded frequency band signal |
| 03/24/1987 | US4653118 Printed circuit transition for coupling a waveguide filter to a high frequency microstrip circuit |
| 03/24/1987 | US4653116 Detector for indicating frequency deviation peaks |
| 03/24/1987 | US4653115 Transmitter battery case |
| 03/24/1987 | US4653076 Timing signal correction system for use in direct sequence spread signal receiver |
| 03/24/1987 | US4653069 Spread spectrum correlation receiver |
| 03/24/1987 | US4653068 Frequency hopping data communication system |