| 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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| 12/27/1977 | US4065789 Surface wave device for use in a ghost cancellation system |
| 12/27/1977 | US4065719 Diagnostic connection means for vehicle mounted radio |
| 12/20/1977 | US4064377 Electronic hybrid and hybrid repeater |
| 12/13/1977 | US4063184 Signal transfer circuit |
| 12/13/1977 | US4063177 Double conversion radio receiver |
| 12/13/1977 | US4063175 Amplifier for receive mode operation |
| 12/13/1977 | US4063039 Stereo noise reduction circuit |
| 12/06/1977 | US4062016 Simultaneous telecommunication between radio stations |
| 12/06/1977 | US4061989 Redundancy switching system |
| 12/06/1977 | US4061981 Voltage variable capacitor tuned radio receiver having delayed automatic frequency control at turn-on |
| 12/06/1977 | US4061980 Radio receiver with plural converters and frequency control |
| 12/06/1977 | US4061974 Ultra stable frequency distribution system |
| 12/06/1977 | US4061973 Synthesizer |
| 11/29/1977 | US4060766 Automatic signal switching apparatus for a combined transceiver and radio or tape recorder set |
| 11/29/1977 | US4060765 Press-to-talk transceiver |
| 11/29/1977 | US4060764 Transceiver audio system |
| 11/22/1977 | US4059801 Apparatus for degrading Q in a high-Q RF pulse transmitting system and the like |
| 11/15/1977 | US4058774 Optical transponder |
| 11/15/1977 | US4058771 Double-balanced frequency converter |
| 11/15/1977 | US4058769 Modulation system with carrier control |
| 11/15/1977 | US4058742 Radio frequency pulse transmitters |
| 11/15/1977 | US4058676 Speech analysis and synthesis system |
| 11/08/1977 | US4057805 Radio-controlled machine power cut-off |
| 11/08/1977 | US4057764 Amplifier |
| 11/01/1977 | US4056787 Self-oscillating mixer circuit |
| 11/01/1977 | US4056782 Wire transmission noise suppressor for a vehicle |
| 11/01/1977 | US4056685 Signal distributing and muting system for multiple channel FM stereo system |
| 10/25/1977 | US4055807 Antenna switch |
| 10/18/1977 | US4054875 Microwave circuit for operating on microwave radiations |
| 10/18/1977 | US4054839 Balanced synchronous detector circuit |
| 10/18/1977 | US4054837 Bidirectional radio frequency amplifier with receiver protection |
| 10/11/1977 | US4053843 Blanker inhibit circuit |
| 10/11/1977 | US4053722 Solid state two-wire/four-wire converter with common battery |
| 10/11/1977 | US4053712 Adaptive digital coder and decoder |
| 10/04/1977 | US4052674 Vhf tuner device |
| 10/04/1977 | US4052563 Multiplex speech transmission system with speech analysis-synthesis |
| 10/04/1977 | US4052559 Noise filtering device |
| 09/27/1977 | US4051475 Radio receiver isolation system |
| 09/20/1977 | US4050022 AM-FM receiver having improved mode conversion |
| 09/13/1977 | US4048597 Planar printed circuit board arrangement useful in the uhf portion of a television tuner |
| 09/13/1977 | US4048570 Multiple-band digital frequency synthesizer receiver |
| 09/13/1977 | US4048566 Suppressed carrier automatic gain control circuitry |
| 09/13/1977 | US4048565 Location indicating device |
| 09/13/1977 | US4048564 Transceiver test device |
| 09/13/1977 | US4048561 Apparatus for preventing simultaneous transmission and channel selection in a transmitter or transceiver |
| 09/13/1977 | US4048443 Digital speech communication system for minimizing quantizing noise |
| 09/06/1977 | US4047116 FM multiplex stereo demodulating circuit |
| 09/06/1977 | US4047110 Transmitter coupled active filter |
| 09/06/1977 | US4047109 Drive-in theater audio system |
| 09/06/1977 | US4047108 Digital transmission system for transmitting speech signals at a low bit rate, and transmission for use in such a system |
| 09/06/1977 | US4047009 Digital tone generator for use with radio transmitters and the like |
| 08/30/1977 | US4045796 Correlation system for pseudo-random noise signals |
| 08/30/1977 | US4045740 Method for optimizing the bandwidth of a radio receiver |
| 08/30/1977 | US4045739 Combined transceiver and radio unit |
| 08/30/1977 | US4045663 Rechargeable flashlight assembly |
| 08/30/1977 | US4044775 Implantable receiver circuit |
| 08/16/1977 | US4042883 Automatic noise limiter |
| 08/16/1977 | US4042882 Radio-balloon distress signal |
| 08/16/1977 | US4042794 Method and means for detecting an outgoing failure in a bidirectional communications span and looping the same in response thereto |
| 08/16/1977 | US4042782 High selectivity radio receiver |
| 08/09/1977 | US4041535 Frequency synthesizer tuning system with signal seek control |
| 08/09/1977 | US4041534 Automatic distortion correction arrangement |
| 08/09/1977 | US4041497 Headband with receiver and directional antenna |
| 08/09/1977 | US4041412 High power, pulsed microwave frequency converter |
| 08/09/1977 | US4041396 Environmentally sensitive transmit power maximizing circuitry and method |
| 08/09/1977 | US4041394 Radio control transmitter |
| 08/09/1977 | US4041390 Transceiver squelch circuit |
| 08/09/1977 | US4041334 Control circuit for actuating a device at a delayed time with respect to the turning on of a power supply and for deactuating the device substantially simultaneously with the turning off of the power supply |
| 08/09/1977 | US4041252 Four-wire hybrid with dc sourcing capability |
| 08/02/1977 | US4040049 Tandem block digital processor for use with nonuniformly encoded digital data |
| 08/02/1977 | US4039957 Signal activated emergency alarm device |
| 08/02/1977 | US4039949 Pulse code modulation with dynamic range limiting |
| 08/02/1977 | US4039947 Protection switching system for microwave radio |
| 08/02/1977 | US4039815 Electro-optical correlator |
| 08/02/1977 | US4039766 Electric two-to-four wire conversion circuit for use in telephone systems |
| 07/26/1977 | US4038689 Frequency synthesizer tuning system with manual fine tuning control |
| 07/26/1977 | US4038686 Defect detection and compensation |
| 07/26/1977 | US4038652 Digital communications line terminal compacter/expander |
| 07/26/1977 | US4038604 Signal to noise ratio indicating circuit |
| 07/26/1977 | US4038603 Transmitter modulation limiter |
| 07/26/1977 | US4038600 Power control on satellite uplinks |
| 07/26/1977 | US4038539 Adaptive pulse processing means and method |
| 07/19/1977 | US4037171 High speed tone decoder utilizing a phase-locked loop |
| 07/19/1977 | US4037158 Two-way FM radio system operating on a single channel and providing simulated duplex operation |
| 07/19/1977 | US4037065 Four-wire converter |
| 07/19/1977 | US4037057 Noise-cancelling apparatus for FM stereo receiver |
| 07/12/1977 | US4035739 Signal dynamic compression and expansion circuits |
| 07/12/1977 | US4035731 Combined binocular radio unit |
| 07/12/1977 | US4035727 Multichannel radio transmitter with means to prevent abnormal wave radiation |
| 07/05/1977 | US4034297 Circuit for disabling a radio transmitter which is continuously operated longer than a predetermined time |
| 07/05/1977 | US4034295 Radio communication system for simultaneous telecommunication between radio stations |
| 07/05/1977 | US4034166 Transmission networks for telephone system |
| 07/05/1977 | US4034160 System for the transmission of speech signals |
| 07/05/1977 | US4033882 Wideband heterodyne receiver for laser communication system |
| 06/28/1977 | US4032983 Adapter for use in transcribers |
| 06/28/1977 | US4032977 Gray scale interpolation technique |
| 06/28/1977 | US4032913 Coding equipment providing compressed code |
| 06/28/1977 | US4032851 Complementary symmetry fet mixer circuits |
| 06/28/1977 | US4032844 Combination microphone, speaker, and control unit for a radio transceiver |
| 06/28/1977 | US4032723 Cordless telephone system |