| 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) |
|---|
| 05/30/1990 | EP0370680A2 Infrared transmitter apparatus |
| 05/30/1990 | EP0370277A2 Sub-band transmission system |
| 05/30/1990 | CN1042636A Technique for actv side-panel noise reduction |
| 05/29/1990 | US4930139 Spread spectrum communication system |
| 05/29/1990 | US4930126 Time division multiplex system suited for burst analog transmission |
| 05/29/1990 | US4930120 Signal distribution network system |
| 05/29/1990 | US4930118 Frame-interval fault detection in a demand assignment TDMA communication system |
| 05/29/1990 | US4929851 Data limiter for a radio pager |
| 05/28/1990 | CA2003831A1 Radio communication apparatus |
| 05/23/1990 | EP0369451A2 Signal distinction circuit |
| 05/23/1990 | EP0369375A2 Spread spectrum communication receiving apparatus |
| 05/23/1990 | DE3839084A1 Communications ear insert |
| 05/22/1990 | US4928314 Heterodyne stage having precise closed-loop control of the amplitude of the injection signal thereof |
| 05/22/1990 | US4927789 Radio programming device with access to a remote database |
| 05/17/1990 | WO1990005431A1 Method and apparatus for automatically adjusting the output power of a transmitter |
| 05/17/1990 | WO1990005427A1 Technique for actv side-panel noise reduction |
| 05/17/1990 | WO1990005390A1 Improved extendable antenna for portable cellular telephones |
| 05/17/1990 | WO1990005388A1 Ceramic filter having integral phase shifting network |
| 05/17/1990 | WO1990005385A1 Battery housing with integral latch and positive displacement apparatus |
| 05/17/1990 | DE3521996C1 Arrangement for recombining a message transmitted by a frequency hopper |
| 05/16/1990 | EP0368390A1 Amplification system for teledistribution |
| 05/16/1990 | CN1042283A Commercial message timer |
| 05/16/1990 | CN1042182A Cucumber mosaic virus coat protein gene |
| 05/16/1990 | CN1008041B Alternating communication channel switchover system |
| 05/16/1990 | CN1008040B Improved amplitude-modulated stereo radio system |
| 05/16/1990 | CN1008039B Amplitude-modulated broadcast transmitter |
| 05/15/1990 | US4926500 Frequency converter |
| 05/15/1990 | US4926440 Spread-spectrum communication apparatus |
| 05/15/1990 | CA1269135A1 Sub-band coders, decoders and filters |
| 05/10/1990 | DE3923207A1 Automatic sound level adjuster for car audio system - has ARI receiver and variable amplifying circuit deriving compensating valve from noise and audio signals |
| 05/09/1990 | EP0367611A2 Mechanical fastening system for an electronic equipment housing |
| 05/09/1990 | EP0367609A2 Improved extendable antenna for portable cellular telephones |
| 05/09/1990 | EP0367608A1 Battery housing with integral latch and positive displacement apparatus |
| 05/09/1990 | EP0367555A2 Reception system on window glass |
| 05/09/1990 | EP0367077A2 Frequency, phase and modulation control system which is especially useful in simulcast transmission systems |
| 05/09/1990 | EP0367061A2 Ceramic filter having integral phase shifting network |
| 05/09/1990 | EP0366975A2 Method and apparatus for frequency control of multiple oscillators using a single frequency-locked-loop |
| 05/09/1990 | EP0366875A2 Wristwatch radiotelephone |
| 05/09/1990 | CN1042034A Battery saver circuit for frequency synthesizer |
| 05/08/1990 | US4924300 Method of and device for tuning a resonant circuit coupled to a frequency discriminator |
| 05/08/1990 | US4924237 Antenna and its electronic circuit combination |
| 05/03/1990 | WO1990004901A1 Voice signal demodulation circuit |
| 05/03/1990 | WO1990004891A1 Voice signal demodulation circuit |
| 05/03/1990 | WO1990004890A1 Voice signal demodulation circuit |
| 05/03/1990 | WO1990004888A1 Battery saver circuit for a frequency synthesizer |
| 05/03/1990 | WO1990004887A1 Digital fm squelch detector |
| 05/03/1990 | DE3836572A1 Front panel for a radio |
| 05/02/1990 | EP0366485A2 Communication system with adaptive transceivers to control intermodulation distortion |
| 05/02/1990 | EP0366086A2 Code shift keying (csk) apparatus and method for spectrum spread communication |
| 05/02/1990 | EP0366025A2 An automatic gain control (AGC) for frequency hopping receiver |
| 05/02/1990 | EP0366001A2 Commercial message timer |
| 05/01/1990 | US4922549 Digital FM squelch detector |
| 05/01/1990 | US4922548 Frequency signal synthesiser |
| 05/01/1990 | US4922547 Microphone circuit |
| 05/01/1990 | US4922535 Transient control aspects of circuit arrangements for altering the dynamic range of audio signals |
| 05/01/1990 | US4922506 Compensating for distortion in a communication channel |
| 05/01/1990 | US4921466 Output processing circuit for radio frequency receiver |
| 05/01/1990 | US4921465 Varactor tuned UHF RF signal input circuit |
| 05/01/1990 | CA1268538A1 Nonvolatile memory system for digital television receiver |
| 04/25/1990 | EP0364749A2 Radio receiver |
| 04/25/1990 | EP0364618A1 Multiple signal transmission device |
| 04/25/1990 | CN1041678A System and method of transmitting complex waveform over communication channel utilizing lincompex techniques |
| 04/25/1990 | CN1041663A Method and circuit for suppressing data channel attach interference |
| 04/24/1990 | US4920285 Gallium arsenide antenna switch |
| 04/24/1990 | CA1268236A1 Universal remote control unit with model identification capability |
| 04/19/1990 | WO1990004288A1 Relative time delay correction system utilizing window of zero correction |
| 04/19/1990 | DE3934314A1 Radio data signal receiver for automobile - performs channel pre selection and automatic switching to different frequency to provide same programme upon loss of signal |
| 04/19/1990 | DE3934282A1 Radio data signal receiver for motor vehicle - initiates interruption mode by data contained in demodulated radio waves for traffic news |
| 04/19/1990 | DE3835261A1 Portable audio and/or video unit |
| 04/19/1990 | DE3834732A1 Transmitting arrangement |
| 04/18/1990 | EP0364273A2 Digital demodulator system |
| 04/18/1990 | EP0364045A1 Transponder and method for the production thereof |
| 04/18/1990 | EP0364036A2 Continuously transmitting and receiving radar |
| 04/18/1990 | EP0363998A2 Portable communications receiver with improved battery saving function |
| 04/18/1990 | EP0363640A2 High-frequency anti-jam communication system terminal |
| 04/18/1990 | CN2056296U Multifunctional transmission-measuring set |
| 04/18/1990 | CN1007690B Method for increasing capable of telephone line circuit |
| 04/17/1990 | US4918749 Receiving configuration for microwave signals |
| 04/17/1990 | US4918748 Apparatus and method for phase noise and post tuning drift cancellation |
| 04/17/1990 | US4918725 Terminal impedance setting circuit for a two-wire to four-wire converting circuit |
| 04/17/1990 | US4918707 Spread spectrum demodulating device for spread spectrum communication system |
| 04/17/1990 | US4918706 Spread spectrum long loop receiver |
| 04/17/1990 | US4918685 Transceiver arrangement for full-duplex data transmission comprising an echo canceller and provisions for testing the arrangement |
| 04/17/1990 | US4918531 Signal selection system |
| 04/17/1990 | US4918439 Remote control device |
| 04/17/1990 | US4918438 Paging receiver having audible and vibrator annunciating means |
| 04/17/1990 | US4918431 Method and apparatus for automatically adjusting the output power of a transmitter |
| 04/11/1990 | EP0363205A2 FM tuner having phase locked loop FM demodulation circuit |
| 04/11/1990 | EP0362797A2 Method for the energy-saving operation of risk detectors in a risk detection arrangement |
| 04/11/1990 | CN1041251A Method of generating amplitude-modulated isb transmission signal and apparatus for carrying out method |
| 04/10/1990 | US4916742 Method of recording and reading audio information signals in digital form, and apparatus for performing same |
| 04/10/1990 | US4916741 FM/FMX stereophonic receiver |
| 04/10/1990 | US4916729 Mobile station for an automobile telephone system |
| 04/10/1990 | US4916460 Distributed antenna system |
| 04/10/1990 | US4916446 Remote control device |
| 04/10/1990 | US4915670 Radio equipped umbrella |
| 04/10/1990 | CA1267727A1 Interface circuit |
| 04/10/1990 | CA1267722A1 Phase selectable circuit for use in a stereo demodulator |
| 04/10/1990 | CA1267693A1 Portable radio transceiver housing structurally supported by a battery |
| 04/05/1990 | WO1990003696A1 Tvro receiver system with automatic bandwidth adjustment |