| 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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| 06/27/1984 | EP0112039A2 Microwave transmitter and communications system |
| 06/27/1984 | EP0111835A2 Klystron tuning control system |
| 06/27/1984 | EP0111612A1 Speech signal coding method and apparatus |
| 06/26/1984 | USRE31614 Decreasing time duration of recorded speech |
| 06/26/1984 | US4457020 Signal processing device for use on radio links |
| 06/26/1984 | US4457012 FM Stereo apparatus and method |
| 06/26/1984 | US4457007 Multipath interference reduction system |
| 06/26/1984 | US4457003 Time reference tracking loop for frequency hopping systems |
| 06/26/1984 | US4456990 Periodic wave elimination by negative feedback |
| 06/26/1984 | CA1169681A1 Signal filter method and apparatus |
| 06/21/1984 | WO1984002443A1 Guard tone capture method |
| 06/19/1984 | US4455682 Superregenerative radio receiver |
| 06/19/1984 | US4455649 Method and apparatus for efficient statistical multiplexing of voice and data signals |
| 06/19/1984 | US4455571 Compression system and compression and expansion system for a composite video signal |
| 06/19/1984 | US4455454 Telephone transmission system on a road-vehicle |
| 06/19/1984 | CA1169544A1 Catv selection device |
| 06/19/1984 | CA1169503A1 Driving point impedance derived from a transfer impedance |
| 06/12/1984 | US4454604 Virtual time base direct synchronizer and method therefor |
| 06/12/1984 | US4454484 Phase-locked loop including an amplifier circuit arrangement |
| 06/05/1984 | US4453269 Apparatus for improving the frequency stability of a transmitter oscillator circuit |
| 06/05/1984 | US4453250 PCM Signal processing apparatus |
| 06/05/1984 | US4453218 For determining oxygen saturation of blood |
| 06/05/1984 | US4453162 Efficient and fast-switching telemetry transmitter |
| 06/05/1984 | US4453137 Signal processor for plural frequency detection and tracking over predetermined range of frequencies |
| 06/05/1984 | US4453091 Level detecting circuit |
| 06/05/1984 | CA1168777A1 Digital two-to-four wire converter for full duplex signals |
| 06/05/1984 | CA1168776A1 Automatic, digitally synthesized matching line terminating impedance |
| 06/05/1984 | CA1168775A1 All digital lsi line circuit for analog lines |
| 06/05/1984 | CA1168714A1 Phase locked loop circuit |
| 05/30/1984 | EP0109880A1 Device for treating speech signals for a radio-electrical transmit-receive equipment adapted for transmission and reception of speech signals |
| 05/29/1984 | US4451921 PCM Signal processing circuit |
| 05/29/1984 | US4451850 Channel selecting device |
| 05/29/1984 | US4451832 Radio frequency transmitter coupling circuit |
| 05/29/1984 | US4451795 Circuit arrangement with controllable transfer characteristic at higher frequencies |
| 05/29/1984 | US4451746 Non-linear emphasis circuit |
| 05/29/1984 | CA1168389A1 Analogue/digital telecommunications subscriber station |
| 05/29/1984 | CA1168356A1 Data transmission or recording with reduced data rate |
| 05/29/1984 | CA1168333A1 Apparatus for controlling and indicating the integrity of the connection of telephone subscribers to a switching system |
| 05/24/1984 | WO1984002044A1 Microwave communications system |
| 05/22/1984 | US4450589 FM Receiver for reception of special announcements and general programs |
| 05/22/1984 | US4450583 Multi-channel transceiver using a single high-stability element |
| 05/22/1984 | US4450495 Portable acoustic device |
| 05/22/1984 | CA1167985A1 Multiplexed signal receiver |
| 05/16/1984 | EP0037813B1 Single sideband receiver with pilot-based feed forward correction for motion-induced distortion |
| 05/15/1984 | US4449248 Battery saving radio circuit and system |
| 05/15/1984 | US4449218 Analog/digital telecommunication subscriber station |
| 05/15/1984 | US4449056 Power supply control system of an installation including several devices having electric circuits |
| 05/15/1984 | CA1167577A1 Multiplexing arrangement for a plurality of voltage controlled filters |
| 05/15/1984 | CA1167563A1 Hardware reduction for digital video system using subsampling and adaptive reconstruction |
| 05/08/1984 | US4447907 Multiple mixer spread spectrum modulation and method therefor |
| 05/08/1984 | US4447808 Rearview mirror transmitter assembly |
| 05/08/1984 | CA1167158A1 Interference compensation system for radio communication |
| 05/08/1984 | CA1167111A1 Selective call receiver |
| 05/08/1984 | CA1167101A1 Current limiting circuit |
| 05/02/1984 | EP0107332A1 Power line filters |
| 05/02/1984 | EP0107017A2 Fiber optic data transmission system |
| 05/02/1984 | EP0106877A1 Apparatus for converting, transmitting and reconverting a sampled signal |
| 05/01/1984 | US4446551 Data highway system with dual transmitting loop lines |
| 05/01/1984 | US4446550 Reliable signal system having at least one transmitter feeding plural series-connected receiver inputs |
| 05/01/1984 | US4446530 Fast hadamard transform device |
| 05/01/1984 | CA1166773A1 Automatic protection apparatus for span lines employed in high speed digital systems |
| 04/25/1984 | EP0106000A1 Digital circuit to suppress changes in a digital signal |
| 04/25/1984 | EP0105932A1 Program-selecting device |
| 04/24/1984 | US4445228 Motorcycle audio system |
| 04/24/1984 | US4445223 Apparatus and method for determining the presence and frequency of a periodic signal |
| 04/18/1984 | EP0105378A1 Up/down counting arrangements |
| 04/18/1984 | EP0105255A1 Pen-size radio |
| 04/17/1984 | US4443890 Optical-connection direct-light modulation information transmission system with a passband extended towards the low frequencies and continuous waves |
| 04/17/1984 | CA1165841A1 Apparatus and method for attenuating interfering signals |
| 04/17/1984 | CA1165840A1 Apparatus and method for determining the presence of a periodic signal |
| 04/17/1984 | CA1165831A1 Remote control system |
| 04/17/1984 | CA1165820A1 Radio receiving apparatus using headphone connector cable as an antenna |
| 04/10/1984 | US4442546 Noise reduction by integrating frequency-split signals with different time constants |
| 04/10/1984 | US4442527 Radio transmitting and receiving system |
| 04/10/1984 | US4442518 Channel switching system for use in a digital communication system |
| 04/10/1984 | US4442434 Antenna circuit of the negative impedance type |
| 04/10/1984 | US4442413 Television receiver phase locked loop tuning arrangement |
| 04/04/1984 | EP0104748A1 RF Watt meter |
| 04/04/1984 | EP0104486A2 Information transmission system |
| 04/04/1984 | EP0104485A2 Information transmission system |
| 04/04/1984 | EP0104313A1 Method and apparatus for narrow band voice transmission |
| 04/04/1984 | EP0104304A2 Car radio |
| 04/04/1984 | EP0104220A1 Supply circuit included in a dc-magnetized hybrid transformer. |
| 04/04/1984 | EP0104206A1 Frequency-hopped single sideband mobile radio system. |
| 04/03/1984 | US4441194 Triple bit non-coherent matched filter receiving system |
| 04/03/1984 | US4441098 Multiposition switch with minimum interconnections |
| 04/03/1984 | US4441084 Noise reduction circuit |
| 04/03/1984 | US4441083 Noise reduction circuit |
| 04/03/1984 | CA1165029A1 Subscriber line audio processing circuit apparatus |
| 04/03/1984 | CA1165023A1 Mechanical tuner with microphonics elimination circuitry |
| 04/03/1984 | CA1164998A1 Method of and arrangement for digitizing a time- discrete video signal using a picture transform coding |
| 03/28/1984 | EP0103917A1 FM stereo receiver |
| 03/28/1984 | EP0103707A2 User-instructing operation for electronic-consumer goods |
| 03/27/1984 | CA1164593A1 Device for powering a subscriber set |
| 03/27/1984 | CA1164588A1 Frequency division communication system wherein conventional transmitter-transceiver can be used as or repeater or local base station |
| 03/27/1984 | CA1164556A1 Remote control system for television monitors |
| 03/27/1984 | CA1164351A2 Multiple variable threshold speech detector |
| 03/27/1984 | CA1164350A1 Compander system |
| 03/20/1984 | US4438529 TV Tuner circuit |
| 03/20/1984 | US4438522 Method for encoding analog signals using PCM difference code word for forming a code word of specified length |