Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › 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
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)
06/1985
06/25/1985US4525835 Duplex radio system utilizing time compression expansion
06/25/1985US4525820 Function selecting method and system for an audio/video recording and reproducing system
06/25/1985US4525713 Electronic tag identification system
06/25/1985US4525686 Phase-locked loop circuit with variable bandwidth filter
06/25/1985CA1189613A1 Simultaneous transmission of two information signals within a band-limited communications channel
06/25/1985CA1189574A1 Amplitude limiter for am broadcast transmitter
06/25/1985CA1189572A1 Radio transmitting and receiving apparatus
06/25/1985CA1189571A1 Service channel signal transmission system
06/20/1985WO1985002734A1 Duplex communication transceiver with modulation cancellation
06/19/1985EP0145332A2 Digital audio transmission
06/19/1985EP0145101A2 Carrier detection circuit
06/19/1985EP0145097A2 Duplex speech transmission method and a system therefor
06/19/1985EP0144538A2 A trigonometric transform function generator
06/18/1985US4524461 Helmet-supported radio transceiver and broadcast receiver system
06/11/1985US4523332 Battery saver circuit for use with paging receiver
06/11/1985US4523329 FM receiver
06/11/1985US4523328 FM-receiver including a frequency-locked loop
06/11/1985CA1188760A1 Apparatus for rejecting jamming waves
06/11/1985CA1188758A1 Electronic arrangement for generating an amplitude and phase-modulated carrier signal
06/11/1985CA1188743A1 Quick disconnect and function change radio assembly
06/11/1985CA1188624A1 Fm stereo apparatus and method
06/06/1985EP0089350A4 Electronic terminator circuit.
06/05/1985EP0143616A2 Hybrid circuit
06/05/1985EP0143584A2 Sub-band coders, decoders and filters
06/05/1985EP0143556A2 Improvements relating to frequency modulation detectors
06/05/1985EP0143458A2 Radio communication system operable in cooperation with a vox system
06/04/1985US4521919 Bathroom radio
06/04/1985US4521918 Battery saving frequency synthesizer arrangement
06/04/1985US4521916 Frequency synthesis tuning control system for a double-conversion tuner
06/04/1985US4521744 Tuning apparatus of phase-locked loop type
06/04/1985US4521646 Methods and apparatus for bandwidth reduction
06/04/1985CA1188423A1 Speech coding method and device for implementing the improved method
06/04/1985CA1188371A1 Microwave integrated circuit mixer
06/04/1985CA1188368A1 Radio receiver system including a control unit and a remote unit
05/1985
05/29/1985EP0143104A2 Search device for avalanche victims
05/29/1985EP0142620A2 Method of recording PCM audio transmission signals with signal error compensation
05/29/1985EP0142503A1 Transceiver with controller for multiple function switch.
05/28/1985US4520483 Signal diagnostic method and apparatus for multiple transmission system
05/28/1985US4520476 Apparatus for enabling the duplex operation of a transmitter and receiver
05/28/1985US4520475 Duplex communication transceiver with modulation cancellation
05/28/1985US4520474 Duplex communication transceiver with modulation cancellation
05/28/1985CA1187960A1 Communication over noisy lines
05/28/1985CA1187942A1 Non-orthogonal mobile subscriber multiple access system
05/22/1985EP0142138A2 Protection switching system for carrier transmission line
05/21/1985US4519069 Communication system interconnecting radios and operators located at different positions
05/21/1985US4519002 Controlling the operations of at least two devices
05/21/1985US4518961 Communication system message receiving device
05/21/1985CA1187602A1 Horn antenna and mixer construction for microwave radar detectors
05/15/1985EP0141741A2 Frequency modulation transmitter for FM broadcasting
05/15/1985EP0141715A2 Automatic precorrection device of non-linearities in a power amplifier circuit, and its application to a television transmitter
05/15/1985EP0141520A2 Sub-band coding method
05/15/1985EP0141452A2 Circuit arrangement for a receiver with two phase-locked loops
05/15/1985EP0141441A1 Communication receiving unit for the suppression of noise and interference signals
05/15/1985EP0141424A2 Audio signal transmission system having noise reduction means
05/15/1985EP0141218A2 Detector for indicating receiving disturbances in FM broadcast reception
05/14/1985US4517679 Line network communication system
05/14/1985US4517561 In a communications system
05/08/1985EP0139803A1 Method of recovering lost information in a digital speech transmission system, and transmission system using said method
05/07/1985US4516270 Microwave receiver front end design
05/07/1985US4516078 Variable frequency passband circuit
05/07/1985CA1186745A1 Emergency communication device
04/1985
04/30/1985US4514844 In a telecommunications switching system
04/30/1985US4514841 Connecting unit for a ring bus
04/30/1985US4514757 CATV selection device
04/24/1985EP0138548A2 Analog-to-digital encoder and digital-to-analog decoder
04/24/1985EP0138547A2 Spectral emphasis and de-emphasis circuits
04/24/1985EP0138366A2 Frequency control for point-to-multipoint radio
04/23/1985US4513446 Control circuit for a radio transceiver
04/23/1985US4513443 Radio receiver suitable for use in a spaced carrier area coverage system
04/23/1985US4513428 Simultaneous detection of time coincident signals in an adaptive doppler tracker
04/23/1985US4513405 Automotive sound system
04/23/1985US4513354 Housing for an electronic circuit board
04/23/1985US4513242 Electronic impedance device for providing a variable impedance
04/17/1985EP0137563A2 Switching method with automatic data phase resetting over +/- 3.5 bitsand device for carrying out said method
04/16/1985US4512035 Method of programming a synthesizer ROM for elimination of receiver self-quieting
04/10/1985EP0136876A2 Recreation apparatus
04/10/1985EP0136757A2 Transceiver station for a frequency hopping information transmission system
04/10/1985EP0136482A2 Noise reduction by linear interpolation using a dual function amplifier circuit
04/09/1985US4510595 Modified time-division transmission technique for digital mobile radio systems
04/09/1985US4510579 Fast correlation system
04/03/1985EP0135994A2 Method for transmitting broadband information over a narrow band transmission medium
04/03/1985EP0135816A2 Signal transmission and reception system
04/03/1985EP0115507A4 General purpose data control system.
04/03/1985EP0054024B1 Subscriber line audio processing circuit apparatus
04/02/1985US4509206 Receiver for multicarrier signals protected from unwanted signals
04/02/1985US4509205 Radio receiver comprising a frequency locked loop with audio frequency feedback, and a muting circuit
04/02/1985US4509202 Full-wave rectification of signals generated by radio frequency transmitting circuits
04/02/1985US4509201 Wireless telephone apparatus with protection against power loss
04/02/1985US4509198 Satellite broadcast signal receiving system
04/02/1985US4509165 Miniaturized antenna duplexer using SAW filter
04/02/1985US4509135 Cosine signal correction circuit
04/02/1985US4509038 Code-converting system for band compression of digital signals
04/02/1985CA1185025A1 Data under voice communications system
04/02/1985CA1184980A1 Baseband linearizer for wideband high power, nonlinear amplifiers
03/1985
03/28/1985WO1985001411A1 Telephone transmission installation
03/27/1985EP0135154A2 Apparatus for controlling transmission output power
03/26/1985US4507632 Electromagnetic wave switch
03/19/1985US4506386 Battery saver for a paging receiver or the like _
03/19/1985US4506376 Subcarrier signal generator for use in stereo tuners
03/19/1985US4506266 Antenna apparatus for vehicle-mounted receiver/transmitter equipment with automatic antenna length control
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