| 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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| 01/19/1994 | EP0579040A2 Connection protection in a digital telecommunications system |
| 01/19/1994 | EP0579029A2 Connection protection in a digital telecommunications system |
| 01/19/1994 | EP0578744A1 Minimum wire interface for multiple accessories |
| 01/19/1994 | EP0417148B1 Fm radio reception unit |
| 01/19/1994 | CN2153911Y Simple synchronous satellite star finding receiver |
| 01/19/1994 | CN1081037A "method and system for the arrangement of vocoder data for the masking of transmission channel induced errors" |
| 01/18/1994 | US5280651 Portable sound system having a detachable headset for selectively engaging the body to form a carrying handle |
| 01/18/1994 | US5280650 DSP based radio with diminished power requirements |
| 01/18/1994 | US5280644 Frequency control circuit, and associated method, for a receiver operative to receive signals-transmitted thereto in intermittent bursts |
| 01/18/1994 | US5280643 Sensitivity switching circuit for radio receiver |
| 01/18/1994 | US5280642 Radio receiver for identifying a region transmitting a broadcast signal |
| 01/18/1994 | US5280640 High speed automatic frequency tuning method |
| 01/18/1994 | US5280639 Double super-heterodyne tuner |
| 01/18/1994 | US5280638 RF filter self-alignment for multiband radio receiver |
| 01/18/1994 | US5280636 Multi-band digital receiving apparatus and method with bandwidth reduction |
| 01/18/1994 | US5280635 Baby monitor transmitter |
| 01/18/1994 | US5280633 Active antenna for two-way transmission |
| 01/18/1994 | US5280561 Method for processing audio signals in a sub-band coding system |
| 01/18/1994 | US5280538 Spread spectrum demodulator |
| 01/18/1994 | US5280526 Transformer-less hybrid circuit |
| 01/18/1994 | US5280499 Spread spectrum communication system |
| 01/18/1994 | US5280498 Packet data communication system |
| 01/18/1994 | US5280471 Arrangement and method for detecting interference in TDMA communications system |
| 01/18/1994 | CA1326263C Fm/fmx stereophonic receiver |
| 01/14/1994 | CA2098679A1 Auditory prosthesis, noise suppression apparatus and feedback suppression apparatus having focused adaptive filtering |
| 01/13/1994 | DE4315346A1 Automatic programming of remotely controlled radio receiver station memory - using free-space or waveguide optical link from transmitter supplied with command sequences from expandable data bank |
| 01/13/1994 | DE4222623A1 Übertragung und Speicherung von mehrkanaligen Tonsignalen bei Anwendung von bitratenreduzierenden Codierverfahren Transmission and storage of multi-channel audio signals when using bitrate reducing coding |
| 01/13/1994 | DE4222321A1 Verfahren und Schaltungsanordnung zum Versorgen von Lautsprechern und anderen elektrischen Verbrauchern in Fahrzeugtüren mit Signalen Method and circuit for supplying speakers and other electrical loads in vehicle doors with signals |
| 01/12/1994 | EP0578561A1 Receiver with internal ferrite antenna |
| 01/12/1994 | EP0578457A2 A data communication system |
| 01/12/1994 | EP0578324A1 Radio transceiver with antenna switch |
| 01/12/1994 | EP0578063A1 Quantization bit number allocation by first selecting a subband signal having a maximum of signal to mask ratios in an input signal |
| 01/12/1994 | EP0578007A1 Circuit arrangement for the recognition and suppression of adjacent channel interferece |
| 01/12/1994 | EP0577888A1 Switch for redundant signal transmission system |
| 01/12/1994 | EP0577861A1 Data transmission by means of electrical distribution lines using frequency hopping |
| 01/12/1994 | EP0577860A1 Data transmission by means of electrical distribution lines using direct sequence spread spectrum |
| 01/12/1994 | EP0577773A1 Vocabulary memory allocation for adaptive data compression of frame-multiplexed traffic |
| 01/12/1994 | EP0577687A1 Identification apparatus and method |
| 01/12/1994 | EP0455738B1 Low bit rate transform coder, decoder and encoder/decoder for high-quality audio |
| 01/12/1994 | EP0289617B1 An interference cancellation system |
| 01/12/1994 | CN2153181Y Sound-control switch for movable simplex communication equipment |
| 01/12/1994 | CN2153180Y Fm costant frequency receiver |
| 01/12/1994 | CN1023536C Interface for tv-vcr system |
| 01/11/1994 | US5278997 Dynamically biased amplifier |
| 01/11/1994 | US5278996 Portable transceiver having consumption-current stabilizing function |
| 01/11/1994 | US5278995 Radio calling method of a portable radio phone providing power conservation functions |
| 01/11/1994 | US5278990 Two way radio communication system |
| 01/11/1994 | US5278870 Reducing interference in r.f. signals |
| 01/11/1994 | US5278867 Receiver system for processing signals received on diversity channels |
| 01/11/1994 | US5278864 Spread spectrum communication device |
| 01/11/1994 | US5278862 Receiver for decoding a spread spectrum transmission |
| 01/11/1994 | US5278837 Multiple user digital receiver apparatus and method with combined multiple frequency channels |
| 01/11/1994 | US5278831 Information transmission system |
| 01/11/1994 | US5278808 Operating unit attaching and removing apparatus for a vehicle-mounted acoustic device |
| 01/11/1994 | US5278777 Efficient cancelling of AC line interference in electronic instrumentation |
| 01/11/1994 | US5278568 Method of and apparatus for two-way radio communication amongst fixed base and mobile terminal users employing meteor scatter signals for communications inbound from the mobile terminals and outbound from the base terminals via Loran communication signals |
| 01/11/1994 | US5278528 Air insulated high frequency filter with resonating rods |
| 01/11/1994 | US5278521 Power saving frequency synthesizer with fast pull-in feature |
| 01/11/1994 | CA2099728A1 Automatic adjustment of receiver apparatus based on channel-bit-error-rate-related parameter measurement |
| 01/11/1994 | CA2030355C Automatic gain control |
| 01/11/1994 | CA2027890C Digital process and device for correcting the non-linearity of a transmission system |
| 01/06/1994 | WO1994000931A1 Frequency selection method and apparatus |
| 01/06/1994 | WO1994000926A1 Method and apparatus for power estimation in an orthogonal coded communication system |
| 01/06/1994 | WO1994000925A1 Fault tolerant radio communication system controller |
| 01/06/1994 | WO1994000924A1 A method and an arrangement of estimating transmitted symbols at a receiver in digital signal transmission |
| 01/06/1994 | WO1994000923A1 Dual mode receiver having battery saving capability |
| 01/06/1994 | WO1994000922A1 Method and apparatus for objective speech quality measurements of telecommunication equipment |
| 01/06/1994 | WO1994000919A1 Synchronous tracking am receiver |
| 01/06/1994 | WO1994000918A1 Method and apparatus for interference cancellation in a multiple access communication receiver |
| 01/06/1994 | WO1994000917A1 Method and apparatus for canceling spread-spectrum noise |
| 01/06/1994 | WO1994000916A1 Arrangement for fitting a standard portable communications apparatus into a protective helmet |
| 01/06/1994 | WO1994000911A1 Control system using harmonic filters |
| 01/06/1994 | WO1994000815A1 Virtual radio interface |
| 01/06/1994 | WO1994000814A1 Virtual data source |
| 01/05/1994 | EP0577301A1 Digital receive line filter circuit with data operated squelch |
| 01/05/1994 | EP0577267A1 Remote controllers and methods of selectively setting remote control signals |
| 01/05/1994 | EP0577044A1 Phase difference correcting demodulator for a receiver for spread spectrum communication |
| 01/05/1994 | EP0576797A2 Reduction of interchannel harmonic distortions in a analog and digital signal multiplex |
| 01/05/1994 | EP0576616A1 Integrated battery contact and mechanical latch |
| 01/05/1994 | EP0576554A1 Communication device with isdn interface |
| 01/05/1994 | EP0470963B1 Radio receiver with digital frequency selection |
| 01/05/1994 | DE4320271A1 Satellite broadcast antenna reception condition indicator - has microcomputer for operational control and automatic voltage amplifying control detector |
| 01/05/1994 | CN2152352Y Carrier wave group control and remote control transmitter |
| 01/05/1994 | CN2152351Y Transmitter with turning knob remote control |
| 01/05/1994 | CN1080414A Apparatus for accepting and retaining an information card |
| 01/04/1994 | US5276921 Transmitter with nonlinearity correction circuit |
| 01/04/1994 | US5276920 In a mobile telephone |
| 01/04/1994 | US5276919 Communication device having an emergency state |
| 01/04/1994 | US5276918 Mobile radio telephone with booster unit |
| 01/04/1994 | US5276917 Transmitter switch-on in a dual-mode mobile phone |
| 01/04/1994 | US5276916 Communication device having a speaker and microphone |
| 01/04/1994 | US5276915 Transceiver having a divide-down transmit offset scheme |
| 01/04/1994 | US5276914 Dual-mode transceiver that switches out a large insertion loss filter during transmission |
| 01/04/1994 | US5276913 Phase-locked-loop circuit for radio transceiver |
| 01/04/1994 | US5276912 Radio frequency power amplifier having variable output power |
| 01/04/1994 | US5276909 Traffic information broadcast system |
| 01/04/1994 | US5276904 Antenna system |
| 01/04/1994 | US5276764 Method and device for compressing and expanding an analog signal |
| 01/04/1994 | US5276729 Radiotelephone for automatically dialing remotely programmed number upon call termination and without user operation |
| 01/04/1994 | US5276705 CCD demodulator/correlator |