| 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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| 04/06/1976 | US3949403 Remote power control apparatus |
| 04/06/1976 | US3949307 Circuit arrangement for digital frequency indication in a radio receiver |
| 04/06/1976 | US3949302 Radio receiver |
| 04/06/1976 | US3949301 Digital click removal and squelch control circuit for an FM receiver |
| 04/06/1976 | US3949240 Switching circuit for power supply to electronic apparatus |
| 04/06/1976 | US3949175 Audio signal time-duration converter |
| 03/30/1976 | US3947782 Diode ring mixer |
| 03/30/1976 | US3947769 Threshold correction system in FSK transmissions |
| 03/30/1976 | US3947766 Combined transceiver and radio unit |
| 03/30/1976 | US3947636 Transient noise filter employing crosscorrelation to detect noise and autocorrelation to replace the noisey segment |
| 03/23/1976 | US3946329 Electronic automatic frequency tuning system |
| 03/23/1976 | US3946317 Radio receiver |
| 03/23/1976 | US3946316 Radio-pillow device |
| 03/23/1976 | US3946313 Combined encoder-decoder apparatus having a single active filter |
| 03/23/1976 | US3946249 Signal control circuit |
| 03/23/1976 | US3946169 Bilateral signal transmission system |
| 03/23/1976 | US3946162 System for transferring wideband sound signals |
| 03/16/1976 | US3945002 Block digital processor for use with nonuniformly encoded digital words |
| 03/16/1976 | US3944932 Receiver filtering out both systematic pulse noise and random noise |
| 03/16/1976 | US3944931 Multi-channel frequency converter having automatic control |
| 03/16/1976 | US3944930 Automatic change-over notification for a receiver |
| 03/16/1976 | US3944929 Monitor for a receiver having means for specifying regions within discrimination domains of a signal space |
| 03/16/1976 | US3944927 Digital transmission system |
| 03/16/1976 | US3944925 Phase-locked loop transceiver having automatic frequency offset selectability |
| 03/16/1976 | US3944853 Video recorder pre-emphasis, de-emphasis circuits |
| 03/09/1976 | US3943567 Ejection device for tape cartridge |
| 03/09/1976 | US3943466 Compander for TDM telecommunication system |
| 03/09/1976 | US3943450 Frequency converting device for RF signals |
| 03/09/1976 | US3943446 Power and modulation control system |
| 03/09/1976 | US3943445 Apparatus for signalling position of downed aircraft |
| 03/02/1976 | US3942117 All saturated switching mode solid state RF amplifier |
| 03/02/1976 | US3942116 Transceiver having improved voice actuated carrier and echo suppression circuit |
| 03/02/1976 | US3942038 Threshold gate having a variable threshold level |
| 02/24/1976 | US3940698 Muting circuit |
| 02/24/1976 | US3940566 Arrangement for preventing interruptions in a time division multiplex transmission link for transfer of data |
| 02/24/1976 | US3940555 Picture signal transmission system |
| 02/24/1976 | US3940286 Deep sea pressure compensated expendable energy source |
| 02/17/1976 | US3939429 Tunable high frequency input circuit for a television receiver that tunes both VHF and UHF channels and can be readily integrated |
| 02/17/1976 | US3939428 Receiver with automatic pass band control |
| 02/17/1976 | US3939426 Method and arrangement for furnishing an indication of multipath reception in an FM receiver |
| 02/17/1976 | US3939425 Noise-squelching circuit using a phase-locked loop |
| 02/17/1976 | US3939421 Circuit for indicating the battery voltage and operation of a radio transmitter |
| 02/17/1976 | US3939418 Walkie-talkie device |
| 02/17/1976 | US3939417 Emergency communications system |
| 02/17/1976 | US3939399 Power circuit with shunt transistor |
| 02/10/1976 | US3938048 Frequency measuring apparatus |
| 02/10/1976 | US3938047 Control circuit for use with amplifier |
| 02/10/1976 | US3938046 Network for isolating antenna from tuner |
| 02/10/1976 | US3938043 Radio switching system |
| 02/10/1976 | US3937886 Power supply switching circuit for combined audio system |
| 02/03/1976 | US3936833 Garage door radio control transmitter assembly |
| 02/03/1976 | US3936752 Device for presetting a television program and the like |
| 02/03/1976 | US3936746 FM receiver having transmitting function |
| 02/03/1976 | US3936619 Four-channel stereophonic reproducing system for reproducing discrete CD-4 four-channel stereo disc |
| 02/03/1976 | US3936610 Dual delay line storage sound signal processor |
| 01/27/1976 | US3935533 Single oscillator microwave transceiver |
| 01/20/1976 | US3934203 Spread spectrum modem |
| 01/20/1976 | US3934191 Circuit arrangement for generating a stabilized direct voltage with superposition of a control voltage |
| 01/20/1976 | US3934190 Signal compressors and expanders |
| 01/20/1976 | US3934099 Bias, feedback and network arrangements for hybrid circuits |
| 01/20/1976 | US3934094 Frequency band converter |
| 01/13/1976 | US3932818 Spectrum notcher |
| 01/13/1976 | US3932814 Heterodyne receiver system |
| 01/13/1976 | US3932712 Telephone transmission system |
| 01/06/1976 | US3931623 Reliable earth terminal for satellite communications |
| 01/06/1976 | US3931621 Variable amplitude timed alarm system |
| 01/06/1976 | US3931577 Radio receiver protection arrangement |
| 01/06/1976 | US3931575 Filter stabilized single oscillator transceivers |