| 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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| 09/11/1991 | EP0390822A4 Identification apparatus and methods |
| 09/11/1991 | EP0377687A4 Spectrally efficient method for communicating an information signal |
| 09/11/1991 | EP0371032A4 Protection of energy information in sub-band coding |
| 09/11/1991 | EP0209527B1 Method of communications between register-modelled radio devices |
| 09/11/1991 | EP0207948B1 Internally register-modelled, serially-bussed radio system |
| 09/11/1991 | CN2084687U Clock controlled radio receiver |
| 09/11/1991 | CN2084686U Memory time-control radio receiving computer |
| 09/11/1991 | CN2084685U Multifunctional sound accompaniment repeater |
| 09/11/1991 | CN1054516A Improved interference filter for tvro reveiver systems and like |
| 09/11/1991 | CN1054513A Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 09/10/1991 | WO1991014312A1 Offset frequency converter for phase/amplitude data measurement receivers |
| 09/10/1991 | US5048119 Broadcast receiver for radio or television signals with storage and interchange of preset stations |
| 09/10/1991 | US5048118 Combination dual loop antenna and bezel with detachable lens cap |
| 09/10/1991 | US5048117 Radio telephone apparatus |
| 09/10/1991 | US5048057 Wireless local area network |
| 09/10/1991 | US5048053 Detecting and tracking circuit for component PN codes |
| 09/10/1991 | US5048052 Spread spectrum communication device |
| 09/10/1991 | US5048015 Interference source identification |
| 09/10/1991 | US5047867 Interface for a TV-VCR system |
| 09/10/1991 | CA2077656A1 Offset frequency converter for phase/ amplitude data measurement receivers |
| 09/10/1991 | CA1288862C Apparatus for tuning the antenna of a miniature personal communications device |
| 09/08/1991 | CA2037544A1 Apparatus for encoding digital data |
| 09/05/1991 | WO1991013506A1 Hybrid analog/digital signal processing |
| 09/05/1991 | WO1991013414A1 Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 09/04/1991 | EP0444929A2 Power source control system for automobile telephone |
| 09/04/1991 | EP0444357A2 Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 09/04/1991 | EP0444322A2 Car radio with digital equalizer |
| 09/04/1991 | EP0360803A4 Portable communications receiver with separate information presentation means and improved battery saving function |
| 09/04/1991 | CN2084254U Hand electric tuning radio |
| 09/04/1991 | CN1054343A Equipment and method for modulation-carrier communication |
| 09/03/1991 | WO1991013370A1 Time domain radio transmission system |
| 09/03/1991 | US5046187 Method and apparatus for notifying completion of data communication for mobile radio telephone |
| 09/03/1991 | US5046136 Radio communication apparatus including power supply device |
| 09/03/1991 | US5046135 Method and apparatus for frequency stabilization of a down converter |
| 09/03/1991 | US5046133 Interference cancellation circuit |
| 09/03/1991 | US5046132 Open field test site reference antenna with integral battery powered signal generator |
| 09/03/1991 | US5046131 Portable radio transceiver apparatus |
| 09/03/1991 | US5046130 Multiple communication path compatible automatic vehicle location unit |
| 09/03/1991 | US5046129 Reducing phase error in received FM multiplex signal |
| 09/03/1991 | US5046127 Transmission path tester for broadcasting |
| 09/03/1991 | US5045973 Procedure for manufacturing a radio telephone chassis and a chassis manufactured according to this procedure |
| 09/03/1991 | US5045971 Electronic device housing with temperature management functions |
| 09/03/1991 | US5045717 Combined bias supply and power shut-off circuit with selective biasing |
| 09/03/1991 | CA1288498C Remote-controlling commander with multi-function rotary dial |
| 09/02/1991 | CA2033488A1 Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 08/29/1991 | WO1991013498A1 Hole placement and fill system based on category selection |
| 08/28/1991 | EP0443997A1 A method of reducing the influence of fading of a Viterbi-receiver having at least two antennas |
| 08/28/1991 | EP0443491A1 Wrist watch type receiver |
| 08/28/1991 | EP0443484A1 Power link, protected by redundancy, for microwave signals |
| 08/28/1991 | EP0443170A2 Method and circuit for IF-band width switching |
| 08/28/1991 | EP0443117A2 Analog line connection |
| 08/28/1991 | CN2083809U Multi-function radio |
| 08/28/1991 | CN1054156A Method of reducing influence of fading of viterbi receiver having at least two antennas |
| 08/28/1991 | CN1054155A Code conversion and recovery system of household radio recorder |
| 08/28/1991 | CN1054154A Method for jointly building short wave transmit-receive station |
| 08/28/1991 | CN1054153A Digital radio receiver of receiving radio frequency sigral modulated wave information |
| 08/28/1991 | CN1013723B Centroid decision circuit |
| 08/27/1991 | US5043977 Method and a circuit arrangement for setting the subscriber line dummy impedances of programmable hybrid circuits |
| 08/24/1991 | CA2036830A1 Microwave signal power link with redundancy protection |
| 08/22/1991 | WO1991012674A1 Process for radio transmission of a time-variant control signal and for receiving such a control signal |
| 08/22/1991 | WO1991012673A1 Radio telephone with detachable selective call receiver |
| 08/22/1991 | WO1991012672A1 Method and apparatus for selective sideband in a proximal cable-less communication system signal |
| 08/22/1991 | WO1991012671A1 Radio-frequency power amplifier with variable impedance and variable output power |
| 08/22/1991 | DE4104096A1 Spread-spektrum-empfangsvorrichtung Spread spectrum receiving apparatus |
| 08/21/1991 | EP0442390A1 Batteryless transponder |
| 08/21/1991 | EP0442376A2 Radio system comprising at least two radio transceivers |
| 08/21/1991 | EP0290581B1 Process for transmitting digital audio-signals |
| 08/21/1991 | CN2083374U Multi-purpose electronic companion |
| 08/20/1991 | US5041917 Facsimile apparatus adapted to communicate via more than one transmission medium each having different transmission quality |
| 08/20/1991 | US5041827 Apparatus for the preparation and wireless transmission of measured values |
| 08/15/1991 | WO1991012698A1 Radio having removable memory means for storing radio user validation code |
| 08/15/1991 | CA2035838A1 Spread spectrum receiving device |
| 08/14/1991 | EP0441580A2 Circuit for reducing distortion produced by an r.f. power amplifier |
| 08/14/1991 | EP0441500A2 Radio Transceiver |
| 08/14/1991 | EP0441237A1 Portable detecting plate which is programmable by fields |
| 08/14/1991 | EP0441031A2 High speed system for reading and writing data from and into remote tags |
| 08/14/1991 | EP0440920A2 Interference detection and reduction |
| 08/14/1991 | EP0440680A1 Digital fm squelch detector |
| 08/14/1991 | DE4004254A1 Radio system with several stations |
| 08/14/1991 | CN2082928U Diode and triode mixed detector |
| 08/14/1991 | CN2082927U Frequency modulation receiver with automatic on/off function |
| 08/14/1991 | CN2082926U Single push-button type multi-channel telecontrol device |
| 08/13/1991 | US5040241 Clock, radio, lighter, light display cabinet |
| 08/13/1991 | US5040239 Tuning circuit and receiver |
| 08/13/1991 | US5040217 Perceptual coding of audio signals |
| 08/13/1991 | US5040189 Multiple frequency radio system employing pulse repeaters |
| 08/13/1991 | CA2013652A1 Fishing reel with radio receiver attached |
| 08/08/1991 | WO1991011875A1 Autodial from database in an electronic wristwatch |
| 08/08/1991 | WO1991011865A1 Adaptive modulation/demodulation signal processing |
| 08/08/1991 | WO1991011864A1 Interference filter for tvro receiver systems |
| 08/08/1991 | WO1991011854A1 Amplitude locked loop circuits |
| 08/08/1991 | WO1991011853A1 Integrated fm detector |
| 08/08/1991 | DE4003418A1 Integrierter fm detektor Integrated fm detector |
| 08/07/1991 | EP0440431A2 Power source control circuitry for an automotive portable telephone |
| 08/07/1991 | EP0440405A1 Channel selecting circuit |
| 08/07/1991 | EP0439982A2 Automatic interconnection device for several electrical apparatuses of the audio, video and/or informatic field |
| 08/07/1991 | EP0439925A2 Maximum likelihood decoding with interference detection for frequency-hopped coded modulation systems |
| 08/07/1991 | EP0439807A2 Code shift keying communication system |
| 08/07/1991 | EP0439782A2 Receiver for broadcast transmissions |
| 08/07/1991 | CN2082488U Three functional replay device |