| 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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| 04/22/1993 | DE4229654A1 Audio and video signal transmission with error correction - protects data groups with bit quantity fluctuating between frames by sorting data bits w.r.t. their importance and distributing bit groups homogeneously within frame |
| 04/22/1993 | DE4134415A1 Antennenempfangsverfahren Antenna reception method |
| 04/21/1993 | EP0538217A1 Apparatus for sound level reduction or operator alerting |
| 04/21/1993 | EP0537960A1 Adjustable bandwidth in a radio telephone |
| 04/21/1993 | EP0537804A2 Speech recording apparatus |
| 04/21/1993 | EP0537690A2 Burst control circuit for use in TDMA communications system |
| 04/21/1993 | EP0537361A1 High efficiency digital data encoding and decoding apparatus. |
| 04/21/1993 | CN2130307Y Antinoise speakerphone |
| 04/21/1993 | CN1071292A Battery saver for wireless telephone |
| 04/21/1993 | CN1071128A Burglar alarm device integrated with car stereo radio |
| 04/20/1993 | US5204986 Battery powered radio devices having a battery saving function |
| 04/20/1993 | US5204985 Housing fastener and power source contact |
| 04/20/1993 | US5204984 Down converter for satellite communication system |
| 04/20/1993 | US5204983 Dual conversion reflex receiver |
| 04/20/1993 | US5204977 Apparatus and method of automatic gain control in a receiver |
| 04/20/1993 | US5204976 Receivers for mobile telephone systems |
| 04/20/1993 | US5204975 Digitally-corrected temperature-compensated crystal oscillator having a correction-suspend control for communications service |
| 04/20/1993 | US5204973 Receiver capable of quickly suppressing defective effect of multipath reflection interference |
| 04/20/1993 | US5204971 Vehicle sound system |
| 04/20/1993 | US5204970 Communication system capable of adjusting transmit power of a subscriber unit |
| 04/20/1993 | US5204904 Apparatus for receiving and processing frequency modulated electromagnetic signals |
| 04/20/1993 | US5204880 Differential line driver employing predistortion |
| 04/20/1993 | US5204878 Method of effecting channel estimation for a fading channel when transmitting symbol sequences |
| 04/20/1993 | US5204877 Spread spectrum modulating device |
| 04/20/1993 | US5204876 Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system |
| 04/20/1993 | US5204875 4-ary correlator, matched filter, and decoder for coherent, direct sequence, spread spectrum applications |
| 04/20/1993 | US5204677 Quantizing error reducer for audio signal |
| 04/20/1993 | US5204662 Monitor television apparatus |
| 04/20/1993 | US5204656 Paging receiver with power supply divider |
| 04/20/1993 | US5204645 Circuit configuration for range switching in tuners |
| 04/20/1993 | CA1316616C Pocket data receiver with full page visual display |
| 04/20/1993 | CA1316585C Method of establishing a signal path between at least two apparatuses and an arrangement of at least two apparatuses for realising the method |
| 04/20/1993 | CA1316574C Moldable/foldable radio housing |
| 04/20/1993 | CA1316573C Method and apparatus for reducing power consumption in a radio telecommunication apparatus |
| 04/19/1993 | WO1993008649A1 Electroacoustic transducer mounting apparatus |
| 04/18/1993 | WO1993008646A1 Method and apparatus for synchronizing simulcast systems |
| 04/15/1993 | WO1993007691A1 A radio frequency local area network |
| 04/15/1993 | WO1993007680A1 Communication device having a speaker and microphone |
| 04/15/1993 | WO1993007677A1 Filter assembly |
| 04/15/1993 | WO1993007598A1 Combination liquid crystal display driver and varactor voltage power supply |
| 04/15/1993 | CA2120520A1 A radio frequency local area network |
| 04/14/1993 | EP0536334A1 System and method for generating signal waveforms in a cdma cellular telephone system |
| 04/14/1993 | EP0231291B1 Electronic surveillance system and transceiver unit therefor |
| 04/14/1993 | CN2130014Y T shape casing for telecommunication connector |
| 04/14/1993 | CN1071036A Variable rate vocoder |
| 04/14/1993 | CN1020323C Commercial message timer |
| 04/13/1993 | US5203032 Station selecting apparatus |
| 04/13/1993 | US5203031 Am radio receiver with improved tracking |
| 04/13/1993 | US5203028 Automatic adjustment radio apparatus |
| 04/13/1993 | US5203022 Clamping assembly for interlocking a radio and battery housing |
| 04/13/1993 | US5203021 Transportable support assembly for transceiver |
| 04/13/1993 | US5203020 Method and apparatus for reducing power consumption in a radio telecommunication apparatus |
| 04/13/1993 | US5203019 Radio receiver with improved automatic gain control |
| 04/13/1993 | US5203013 Radio telephone system supporting busy and out-of-range function |
| 04/13/1993 | US5202925 Fm stereophonic receiver |
| 04/13/1993 | US5202924 Stereo FM radio receiver with variable band pass stereo decoder |
| 04/13/1993 | US5202817 Hand-held data capture system with interchangeable modules |
| 04/13/1993 | US5202666 Method and apparatus for enhancing hygiene |
| 04/13/1993 | US5202585 Electronic device including improved connection device |
| 04/13/1993 | CA2000683C Power conservation method and apparatus for a portion of a predetermined signal |
| 04/13/1993 | CA1316221C Self-programming scanning radio receiver |
| 04/13/1993 | CA1316219C Card-type radio receiver having slot antenna integrated with housing thereof |
| 04/08/1993 | DE4132907A1 Filteranordnung Filter assembly |
| 04/07/1993 | EP0535903A1 Miniature portable radio communication apparatus |
| 04/07/1993 | EP0535889A2 Method and apparatus for audio data compression |
| 04/07/1993 | EP0535858A2 Selection of transmission facilities using optical wavelength division multiplexing |
| 04/07/1993 | EP0535800A2 General-purpose synthesizer for a radio apparatus |
| 04/07/1993 | EP0535749A2 Local communication bus system and apparatuses for use in such a system |
| 04/07/1993 | EP0535669A1 Burst signal transmitter |
| 04/07/1993 | EP0535494A2 Optical homodyne receiver for PSK signals |
| 04/07/1993 | EP0535403A1 Reception of TDMA digital data signal with compensation for channel variations |
| 04/07/1993 | EP0535363A2 Receiver for amplitude, frequency and/or FSK modulated signals on different carrier frequencies |
| 04/07/1993 | EP0489013A4 Radio and electronic card assembly |
| 04/06/1993 | US5201072 Tuner for diversity reception having a fixed antenna and a retractive antenna |
| 04/06/1993 | US5201071 Method and apparatus for reducing the peak envelope voltage of an RF transmitter while maintaining signal average power |
| 04/06/1993 | US5201070 Radio communication apparatus comprising a single level controller |
| 04/06/1993 | US5201069 Electroacoustic transducer mounting apparatus |
| 04/06/1993 | US5201067 Personal communications device having remote control capability |
| 04/06/1993 | US5201065 Planar millimeter wave two axis monopulse transceiver with switchable polarization |
| 04/06/1993 | US5201064 Multiple-line superheterodyne transmission and reception device |
| 04/06/1993 | US5201062 Noise reducing circuit |
| 04/06/1993 | US5201061 Method and apparatus for synchronizing simulcast systems |
| 04/06/1993 | US5201003 High fidelity stereophonic reproduction system |
| 04/06/1993 | US5201001 Pilot signal cancelling system |
| 04/06/1993 | US5200826 TV signal receiving double conversion television tuner system having automatic gain control provisions |
| 04/06/1993 | US5200824 Luminance signal noise suppressor |
| 04/06/1993 | CA2015553C Radio transmitter capable of compensating for a frequency characteristic of an antenna and/or a coupling circuit |
| 04/06/1993 | CA1315901C Characterized fast tuning control for a television system |
| 04/06/1993 | CA1315866C Exterior structure for cabinet |
| 04/06/1993 | CA1315862C Microwave landing system with fail-soft switching of dual transmitters, beam steering and sector analysis |
| 04/01/1993 | WO1993006685A1 Mobile communications device registration method |
| 04/01/1993 | WO1993006682A1 Battery saver for wireless telephone |
| 04/01/1993 | WO1993006664A1 Low battery detector |
| 04/01/1993 | WO1993006660A1 Method and apparatus for perturbation cancellation of a phase locked oscillator |
| 03/31/1993 | EP0534681A2 Power booster for a radiotelephone |
| 03/31/1993 | EP0534680A1 Pin diode driver circuit with DC bias terminal and timing delay circuit for high power HF input protection of radar low-noise amplifier |
| 03/31/1993 | EP0534486A2 Direct conversion FSK demodulator |
| 03/31/1993 | EP0534384A2 Cross-polarization interference canceller |
| 03/31/1993 | EP0534255A2 Multiple use digital transmitter/transceiver with time multiplexing |
| 03/31/1993 | EP0533887A1 Method and apparatus for accommodating a variable number of communication channels in a spread spectrum communication system |