| 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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| 04/07/1988 | DE3733096A1 Data demodulating circuit for an FM multiplex radio receiver |
| 04/06/1988 | EP0262576A2 Transceiver for electrical communication |
| 04/05/1988 | US4736461 Method of transmitting terminating call signals within a restricted duration and a base station and a portable unit for use in the same |
| 04/05/1988 | US4736460 Multipath reduction system |
| 04/05/1988 | US4736459 FM receivers using two-terminal negative admittance networks |
| 04/05/1988 | US4736455 Interference cancellation system |
| 04/05/1988 | US4736454 Integrated oscillator and microstrip antenna system |
| 04/05/1988 | US4736433 Circuit arrangements for modifying dynamic range using action substitution and superposition techniques |
| 04/05/1988 | US4736432 Electronic siren audio notch filter for transmitters |
| 04/05/1988 | US4736390 Zero IF radio receiver apparatus |
| 04/05/1988 | US4736277 Metal printed circuit panels including mesas for coupling circuitry thereon to signal ground |
| 04/05/1988 | US4736207 Tag device and method for electronic article surveillance |
| 04/05/1988 | US4736163 Circuit for detecting and suppressing pulse-shaped interferences |
| 04/05/1988 | US4735377 Remote control holder |
| 04/05/1988 | US4735258 Cooling air treatment device for transmitter valves |
| 04/05/1988 | CA1234875A1 Radio communication system comprising a portable unit carrying out a battery saving operation related to a scanning operation of a fixed unit |
| 03/30/1988 | EP0261601A2 Channel-system switching system for digital data radio-communication system |
| 03/30/1988 | EP0261483A1 Arrangement for putting through audio signals |
| 03/30/1988 | EP0261423A2 Driver circuit for driving a light emitting element by superimposing an analog sub-information signal over a digital main signal |
| 03/30/1988 | EP0261127A1 Tdm communication system for efficient spectrum utilization. |
| 03/30/1988 | EP0261112A1 Method and apparatus for controlling a tdm communication device. |
| 03/30/1988 | EP0093190B1 Extrema coding signal processing method and apparatus |
| 03/29/1988 | US4734049 Mechanical latch mechanism for combination portable transceiver and charging unit |
| 03/29/1988 | CA1234604A1 Electronic circuit capable of stably keeping a frequency during presence of a burst |
| 03/24/1988 | WO1988002201A1 Digital audio companding and error conditioning |
| 03/24/1988 | DE3631068A1 Cordless telephone system |
| 03/23/1988 | EP0260851A2 Data transmission system with correlation receiver |
| 03/23/1988 | EP0260766A1 Primary receiving unit for polarized microwaves, parabolic antenna and receiving station comprising such a unit |
| 03/23/1988 | EP0260752A1 Active symmetrical balance hybrid circuit |
| 03/23/1988 | EP0260603A2 Channel switching system |
| 03/23/1988 | EP0260549A1 Mobile telephone |
| 03/22/1988 | US4733403 Digital zero IF selectivity section |
| 03/22/1988 | US4733320 Line protection switch equipment |
| 03/16/1988 | EP0259553A2 Table controlled dynamic bit allocation in a variable rate sub-band speech coder |
| 03/15/1988 | US4731877 Tunable lowpass-highpass switching filter |
| 03/15/1988 | US4731874 Radio receiver having second receiver part for avoiding interference signals |
| 03/15/1988 | US4731871 Tuning device for liquid crystal television |
| 03/15/1988 | US4731870 Platform transmitter terminal (PTT) for use with an ARGOS type satellite system and utilizing a solar array/rechargeable battery power source |
| 03/15/1988 | US4731869 Target tracking transmitter having two levels of power operation |
| 03/15/1988 | US4731844 Apparatus for cancelling a pilot signal from a composite signal |
| 03/15/1988 | US4731816 Ensemble modem structure for imperfect transmission media |
| 03/15/1988 | US4731796 Multi-mode radio transceiver |
| 03/15/1988 | US4731654 Nonvolatile memory system for digital television tuner |
| 03/10/1988 | WO1988001816A1 Hidden preamble for frequency hopped synchronization |
| 03/10/1988 | DE3629142A1 Radio relay equipment inset |
| 03/09/1988 | EP0259129A2 Portable radio communication apparatus having diversity reception function |
| 03/09/1988 | EP0258415A1 Syringe-implantable identification transponder. |
| 03/09/1988 | EP0258277A1 Dual band antenna permitting connectorless antenna coupler |
| 03/09/1988 | EP0258274A1 Portable radio transceiver housing structurally supported by an integral battery |
| 03/09/1988 | CN87105899A Driver circuit for driving light emitting element by superimposing an analog sub-information signal over digital main signal |
| 03/08/1988 | US4730340 Communication system |
| 03/08/1988 | CA1233888A1 Image suppression mixer of the waveguide type |
| 03/08/1988 | CA1233883A1 Housing assembly for portable radio apparatus with one-piece base-plate and battery container |
| 03/08/1988 | CA1233881A1 Radio transceiver including an antenna switching circuit |
| 03/08/1988 | CA1233880A1 Method of communications between register-modelled radio devices |
| 03/03/1988 | DE3628766A1 Vehicle radio with or without cassette component and a retrofit component |
| 03/02/1988 | EP0257684A1 Method of establishing a signal path between at least two apparatuses and an arrangement of at least two apparatuses for realising the method |
| 03/02/1988 | EP0257544A2 Receiving device for microwave signals |
| 03/01/1988 | US4729129 VSWR protection circuit apparatus |
| 03/01/1988 | US4728949 Remote control device for controlling various functions of one or more appliances |
| 03/01/1988 | CA1233577A1 Doubly-balanced mixer termination |
| 03/01/1988 | CA1233576A1 Multiband local oscillator |
| 03/01/1988 | CA1233539A1 Crossed beam high frequency anti-theft system |
| 03/01/1988 | CA1233531A1 Electronic hybrid circuit |
| 02/24/1988 | EP0256596A2 Decoding transmitted scrambled signals |
| 02/24/1988 | CN86200071U Balanced mixer for 2 cm microwave slot bridge |
| 02/23/1988 | US4727540 Apparatus for remote signalling on a digital transmission link |
| 02/23/1988 | US4727504 Interference canceller and signal quantizer |
| 02/23/1988 | US4727426 Digital television receiver with memory refreshing circuitry |
| 02/23/1988 | US4727360 Frequency-dividing transponder and use thereof in a presence detection system |
| 02/23/1988 | US4726632 Anti-theft assembly to fasten a radioreceiver into dashboards or the like of motor-vehicles |
| 02/17/1988 | EP0255927A2 Switchable tuner-preamplifier |
| 02/16/1988 | US4726073 Receiver including a multipath transmission detector |
| 02/16/1988 | US4726070 For permitting radio communication |
| 02/16/1988 | US4726069 A muiti-mode modulation and demodulation system and method |
| 02/16/1988 | US4726042 A/D converters |
| 02/16/1988 | US4726020 Multiplex information transmission system |
| 02/16/1988 | US4725972 Method and apparatus for the transmission of time discrete signals between systems operating at different sampling rates |
| 02/11/1988 | WO1988001104A1 Multiple resonator component-mountable filter |
| 02/11/1988 | DE3626792A1 Device for stabilising the transmitting and receiving frequency of a transmitting set |
| 02/10/1988 | EP0255670A2 Mobile communications system capable of avoiding interference with control channel |
| 02/10/1988 | EP0255553A1 Method for receiving frequency-modulated stereo-multiplex signals |
| 02/09/1988 | US4724545 Squelch detecting circuit with squelch start determining means |
| 02/09/1988 | US4724535 Low bit-rate pattern coding with recursive orthogonal decision of parameters |
| 02/09/1988 | US4724441 Transmit/receive module for phased array antenna system |
| 02/04/1988 | DE3625891A1 Audible sound transmission system |
| 02/03/1988 | EP0255095A2 Transponder antenna |
| 02/03/1988 | EP0255048A2 Portable radio telephone having power saver |
| 02/02/1988 | US4723318 Active polyphase filters |
| 02/02/1988 | US4723306 Wide-band transmitter for short electromagnetic waves |
| 02/02/1988 | US4723305 Dual band notch antenna for portable radiotelephones |
| 02/02/1988 | US4723304 Mobile station and a mobile radio communication network in which electric power is saved without reduction of an activity ratio of radio communication channels |
| 02/02/1988 | US4723294 Noise canceling system |
| 02/02/1988 | CA1232380A1 Correlation detectors for use in direct sequence spread spectrum signal receiver |
| 02/02/1988 | CA1232328A1 Digital data transceiver for power line communications system |
| 01/28/1988 | WO1988000760A1 Injection switch and directional coupler |
| 01/28/1988 | DE3623783A1 Information transmission system |
| 01/27/1988 | EP0254116A2 Circuit arrangement for adaptation of a two-wire subscriber line circuit for the connection with a coupling device with single wire interconnection in telephone exchanges, especially private branch exchanges |
| 01/27/1988 | EP0254029A2 Process for filtering a noisy signal |
| 01/27/1988 | EP0253947A2 Broadcast apparatus for cars |