Patents
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)
11/1992
11/19/1992EP0513477A2 Preset type radio receiver
11/19/1992EP0513313A1 Method for resetting the local oscillators of a receiver and device for implementing such method.
11/19/1992DE4116126A1 Transmitter for frequency hopping operation - has hopping harmonic wave filter between HF power amplifier and aerial matching network
11/18/1992CN2122454U Megaphone radio set
11/18/1992CN1066353A Polling for detection of power supply or other failures of digital circuit
11/18/1992CN1066352A Interference detection technique
11/18/1992CA2068822A1 Tdma radio communication apparatus
11/17/1992US5164985 Passive universal communicator system
11/17/1992US5164959 Use with a spread spectrum communications system
11/17/1992US5164830 Audio level equalization of television sound, broadcast fm and national weather service fm radio signals
11/17/1992US5164689 N-way power combiner/divider
11/17/1992CA1310418C Speech processor
11/16/1992CA2063667A1 Mobile radio audio system
11/14/1992CA2102914A1 Dual mode transmitter and receiver
11/14/1992CA2102293A1 Shock isolation for selective call receivers
11/12/1992WO1992020173A1 Receiver with signal classifier
11/12/1992WO1992020169A1 Electronic duplex communication system
11/12/1992WO1992020168A1 Digital option select system
11/12/1992WO1992020167A1 A personal communications device having remote control capability
11/12/1992WO1992020164A1 Transceiver with rapid mode switching capability
11/12/1992WO1992020149A1 Device and method for adjusting a bandpass filter, especially a combiner filter
11/11/1992EP0512606A2 Time-discrete stereo decoder
11/11/1992EP0512604A2 System for interconnection of domestic video appliances
11/11/1992EP0512374A1 Audio level equalization of television sound, broadcast FM and national weather service FM radio signals
11/11/1992EP0512206A2 Method for selecting a mode of operation for an entertainment appliance
11/11/1992EP0511989A1 Amplitude locked loop circuits.
11/11/1992EP0511968A1 Interference filter for tvro receiver systems
11/11/1992CN1066163A Radio receiver with nicam or dab decoder
11/10/1992US5163160 Satellite transponder able to use same frequency scheme for transmitter and receiver local oscillator
11/10/1992US5163159 Dual mode automatic frequency control
11/10/1992US5163158 Modular communications system including a portable unit range extender and selective-call system
11/10/1992US5163053 Audio signal demodulation circuit
11/10/1992US5163041 Signal branching method applied to a protection switching equipment provided in a drop-insert station of a transmission system
11/10/1992CA2066020A1 High speed transition signalling communication system
11/10/1992CA1310067C Single-frequency time division duplex transceiver
11/10/1992CA1310066C Mobile radio interface
11/08/1992WO1992020178A1 Spread spectrum correlator
11/05/1992DE4204879A1 Fernbedienung Remote control
11/05/1992DE4114058A1 Multichannel receiver for spread-spectrum signal - provides correlation of scanning values with code simulated in code control circuit
11/04/1992WO1992020207A1 Electrical interconnect apparatus
11/04/1992WO1992020163A1 Transmitter filter with integral directional coupler for cellular telephones
11/04/1992EP0511708A2 Method and apparatus for communication channel identification and signal restoration
11/04/1992EP0511692A2 Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio
11/04/1992EP0511511A2 Microprocessor controlled electronic equipment
11/04/1992EP0511341A1 A radio transceiver system.
11/04/1992EP0511295A1 Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions
11/04/1992EP0323996B1 Oscillator network and quadrature network for radio receiver
11/04/1992CN2121063U Miniature tap recorder with earphone storehouse
11/04/1992CN1065964A Apparatus for encoding fishfinder image information and transmission method
11/04/1992CA2083278A1 Electrical interconnect apparatus
11/03/1992US5161253 Preset scanning method for radio receivers
11/03/1992US5161250 Single use radio device and method for using the same
11/03/1992US5161210 Coder for incorporating an auxiliary information signal in a digital audio signal, decoder for recovering such signals from the combined signal, and record carrier having such combined signal recorded thereon
11/03/1992US5161198 Mobile radio audio system
11/03/1992US5161185 Method and apparatus for reducing noise in a digital voltage signal
11/03/1992US5161131 In line switchable audio enhancement device for CD adapter
11/03/1992US5161044 Optical transmitters linearized by means of parametric feedback
10/1992
10/30/1992WO1992020176A1 Vocabulary memory allocation for adaptive data compression of frame-multiplexed traffic
10/30/1992WO1992020165A1 Interference detection technique
10/29/1992WO1992019093A1 Radio receiver, especially vehicle radio
10/28/1992EP0511010A2 system for data communication on automobile
10/28/1992EP0510997A2 Satellite broadcasting receiving system
10/28/1992EP0510914A2 RDS receiver
10/28/1992EP0510848A2 Continuous reception of program channels by a mobile receiver unit
10/28/1992EP0510739A2 Local communication bus system and apparatuses for use in such a system
10/28/1992EP0510116A1 Method and apparatus for providing maximum rate modulation or compression encoding and decoding
10/28/1992CN2120409U Portable frequency-modulation intercom for use of mine
10/28/1992CN1065765A Signal weighting system for digital receiver
10/28/1992CN1065763A Intermodulation compensation in receiver
10/28/1992CN1065762A Apparatus and method of dc offset correction for receiver
10/27/1992US5159714 Portable audio module with headrest
10/27/1992US5159711 Interference filter with high degree of selectivity for tvro receiver system
10/27/1992US5159710 Zero IF receiver employing, in quadrature related signal paths, amplifiers having substantially sinh-1 transfer characteristics
10/27/1992US5159709 Arrangement having tracking if filter
10/27/1992US5159708 Multipath detector for an fm tuner
10/27/1992US5159707 Diversity receiver
10/27/1992US5159706 In a radio transceiver unit
10/27/1992US5159705 Frequency synthesizer circuit
10/27/1992US5159579 Apparatus for encoding fishfinder image information and transmission method
10/27/1992US5159315 Communication system with environmental condition detection capability
10/27/1992US5159283 Power amplifier
10/27/1992US5159191 Apparatus and method for using ambient light to control electronic apparatus
10/27/1992CA1309467C Paging receiver utilizing digital voice coding with improved voice reconstruction characteristics
10/24/1992CA2065659A1 Continuous reception of program channels by a mobile receiver unit
10/22/1992DE4112828A1 Rundfunkempfaenger, insbesondere fahrzeugempfaenger Rundfunkempfaenger, especially fahrzeugempfaenger
10/21/1992EP0509850A2 Cellular mobile communication system wherein service area is reduced in response to control signal contamination
10/21/1992EP0509725A2 Reducing audible noise in stereo receiving
10/21/1992EP0509284A2 Rechargeable battery powered electronic equipment with the headphone connector used for connection to either headphones or a battery changer
10/21/1992EP0509116A1 Pendant switch for controlling lifting devices and for crane-devices
10/21/1992EP0509037A1 Automatic data restoral for modems
10/21/1992EP0497769A4 System with compact spectrum
10/21/1992CN2119728U Transmitter for network fm broadcast
10/21/1992CN2119727U Transmitter for network fm broadcast
10/21/1992CN1065565A Coding method for digital audio signal
10/21/1992CN1018786B Radio receiver of receiving modulated radio frequency signal
10/20/1992US5157786 Biasing networks for balanced mixers
10/20/1992US5157760 Digital signal encoding with quantizing based on masking from multiple frequency bands
10/20/1992US5157728 Automatic length-reducing audio delay line
10/20/1992US5157689 GOLD code generating device in a spread spectrum communication device
10/20/1992US5157688 Spread spectrum transmitter for degrading spread spectrum feature detectors