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)
11/1989
11/08/1989EP0340301A1 Digital adaptive transform coding process
11/07/1989US4879762 Optical repeater and regulated current feeding system for the same
11/07/1989US4879759 Holding structure for a paging receiver having extra functions
11/07/1989US4879758 Communication receiver system having a decoder operating at variable frequencies
11/07/1989US4879757 Tweet elimination, or reduction, in superheterodyne receivers
11/07/1989US4879726 Spread spectrum communications system
11/07/1989US4879533 Surface mount filter with integral transmission line connection
11/07/1989EP0273031A4 Characterized fast tuning control for a television system.
11/02/1989WO1989010663A1 Cable televison spread spectrum data transmission apparatus
11/02/1989WO1989010661A1 Spectrally efficient method for communicating an information signal
11/02/1989WO1989010659A1 Detachable battery pack with a built-in broadband antenna
11/02/1989EP0339628A2 Detachable battery pack with a built-in broadband antenna
11/02/1989EP0339482A1 Time-piece provided with an antenna
11/01/1989CN2047081U Automatic electronic calling type pocket radio
10/1989
10/31/1989US4878252 Modified multi-path detector
10/31/1989US4878251 Interference signal suppressor for a radio receiver
10/31/1989US4878244 Electronic hybrid circuit
10/31/1989US4878228 Microwave relay station having a common standby channel for signals of different types of modulation
10/31/1989US4878052 Hand-held transmitter for the emission of coded electromagnetic pulses, and a receiver for receiving pulses emitted by the transmitter
10/31/1989CA1262562A1 Portable radio
10/25/1989EP0338834A2 Mobile telephone terminal having function to perform call clear process
10/25/1989EP0338129A2 Transceiver coupler for one-pair cabling of a high-speed network
10/25/1989EP0338125A1 Method and apparatus for nulling local oscillator feedthrough
10/25/1989EP0338040A1 Process for transmitting audio signals
10/25/1989EP0252943A4 Variable capacitance circuit.
10/25/1989CN2046695U Emitting and receiving device of photoelectric controller
10/25/1989CN1036667A Surface mount filter with integral transmission line connection
10/24/1989US4876741 Method of receiving a compressed composite signal
10/19/1989WO1989010030A1 Actuator and communication system
10/19/1989WO1989009965A1 Error detection method for sub-band coding
10/18/1989EP0337876A1 Arrangement for reducing the energy drain of a cyclical working equipment such as a time-multiplexed switcher
10/18/1989EP0204770B1 Data transmission system including adaptive hybrid control
10/18/1989CN2046297U Multifunction reception device
10/18/1989CN2046295U Automatic switch of radio receiver
10/17/1989US4875221 Spread spectrum receiver
10/17/1989US4874110 Lens structure for a combined radio/audio tape cassette player or the like
10/11/1989EP0336832A1 Asynchronous digital correlator and demodulators comprising such a correlator
10/11/1989EP0336684A2 Noise reduction in the playback of recorded sound
10/11/1989EP0336650A2 Self-programming scanning radio receiver
10/11/1989EP0336614A2 UHF RF signal input circuit
10/11/1989EP0336418A2 Global positioning system receiver capable of computing heading information.
10/11/1989EP0336375A1 Transmitting apparatus
10/11/1989EP0336255A1 Surface mount filter with integral transmission line connection
10/11/1989CN2045638U Anti-noise device
10/10/1989US4873699 Method and device for coding and decoding a broadband transmission
10/10/1989US4872854 Simulated ball used in sports incorporating an electronic component
10/10/1989CA1262263A1 Rf-am transmitter with pulse width modulator
10/05/1989WO1989009519A1 Mixed mode compression for data transmission
10/05/1989WO1989009498A1 Surface mount filter with integral transmission line connection
10/05/1989WO1989009462A1 Portable remote control desk
10/05/1989DE3810180A1 Broadcast receiver, particularly vehicle receiver
10/05/1989DE3810179A1 Broadcast receiver, particularly vehicle receiver
10/05/1989DE3810178A1 Broadcast receiver, particularly vehicle receiver
10/04/1989EP0335141A2 Car radio with a circuitry to detect local receiving noise
10/04/1989EP0334940A1 Method and apparatus for isolating faults in an antenna system
10/03/1989US4872206 Mixer dynamic control
10/03/1989US4872205 Radio communication system having autonomously selected transmission frequencies
10/03/1989US4872200 System of orthogonal code generators, radios provided with a code generator and code generators of such a system
09/1989
09/28/1989DE3807408C1 Method for transmitting-end bandwidth compression of an analog signal and for receiving-end expansion of the transmitted signal and a device to carry out the method
09/27/1989EP0334108A2 Receiver for spread-spectrum signals, especially a GPS-type receiver
09/27/1989EP0148879B1 Squelch circuit
09/27/1989CN1035926A Improved amplitude modulation stereophonic radio system
09/27/1989CN1035924A Radio station having wide-band automatic gain controlling circuit
09/26/1989US4870699 Method and apparatus for controlling the frequency of operation and at least one further variable operating parameter of a radio communications device
09/26/1989US4870698 Output power control circuit for a mobile radio apparatus
09/26/1989US4870696 Mobile communications system capable of avoiding interference with control channel
09/26/1989US4870480 Subnyquist demodulator as for a television receiver
09/26/1989CA1261906A1 Remote control transmitter
09/26/1989CA1261400A2 Individual simulcast transmitter remote control system
09/26/1989CA1261399A2 Individual simulcast transmitter remote control system
09/26/1989CA1261397A1 Method for the transmission of digital data
09/26/1989CA1261084A1 Method for adapting two systems with different scanning rates
09/26/1989CA1261009A1 Signal generator
09/26/1989CA1260544A1 Channel switching system without instantaneous signal loss
09/26/1989CA1260543A1 Power supply switch circuit comprising two mos fets connected in series opposition
09/26/1989CA1260141A1 Decoder for spectrum diffusion signals
09/21/1989WO1989008947A1 Frequency control system
09/21/1989DE3808365A1 Protective housing for transmitters and/or radio receivers of a device which is used in underground mining
09/21/1989DE3807597A1 Circuit arrangement for an audio receiver with a recording device
09/20/1989EP0333419A2 Transceivers
09/20/1989EP0333266A2 A direct conversion receiver
09/20/1989EP0333194A2 Radio data system receiver
09/20/1989EP0333042A1 Receiver for a space diversity radio transmission system
09/20/1989EP0332792A1 Data transmission system connectable to the telephone switched network
09/20/1989CN1035746A Tv signal frequency transforming circuit
09/19/1989US4868888 Audio communications module for an office chair
09/19/1989US4868885 Apparatus and method for high-speed determination of received RF signal strength indicator
09/19/1989US4868874 Echo canceller
09/19/1989US4868868 Sub-band speech analyzing and synthesizing device
09/19/1989US4868859 Supervised, interactive alarm reporting system
09/19/1989US4868576 Extendable antenna for portable cellular telephones with ground radiator
09/19/1989US4867398 Radio mounting assembly having self-aligning trim bezel
09/19/1989EP0310632A4 Cross-flow filtration device and method of making.
09/19/1989CA1259720A1 Cordless telephone system
09/19/1989CA1259690A1 Television receiver
09/19/1989CA1259663A1 Noise canceling system
09/19/1989CA1259662A1 Shf receiver
09/13/1989EP0332290A2 Equaliser for radio receiver
09/13/1989EP0332199A2 Transmission line switching system
09/13/1989CN2044394U Receiver for tv aural
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