| 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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| 12/14/1976 | US3997842 Method and apparatus for monitoring modulation devices for video signals |
| 12/07/1976 | US3996554 Data transmission system |
| 12/07/1976 | US3996520 Interference rejecting logarithmic receiver |
| 12/07/1976 | US3996419 Technique for minimizing multi-path distortion effects in video transmission |
| 11/30/1976 | US3995219 Interference suppression circuit for automobile radio receivers |
| 11/16/1976 | US3992674 Balanced dual output mixer circuit |
| 11/16/1976 | US3992669 Radio frequency protection circuit |
| 11/09/1976 | US3991419 Receiver system for locating transmitters |
| 11/09/1976 | US3991371 Automatic frequency control of voltage variable capacitor tuned receivers |
| 11/09/1976 | US3991370 Peak limiter |
| 11/09/1976 | US3991369 Cartridge-type radio-communication device |
| 11/09/1976 | US3991278 Line protection switching system |
| 11/02/1976 | US3990040 Apparatus for transmitting distress signals |
| 11/02/1976 | US3990009 Method and apparatus for uniquely encoding channels in a digital transmission system |
| 11/02/1976 | US3989896 Method and apparatus for speech identification |
| 10/26/1976 | US3988690 Amplifier circuit having a floating input stage |
| 10/26/1976 | US3988675 Transmit-receive switching circuit with audio muting |
| 10/19/1976 | US3987257 Optically coupled two-wire to four-wire hybrid lines |
| 10/12/1976 | US3986167 Communication apparatus for communicating between a first and a second object |
| 10/12/1976 | US3986119 Emergency communication system |
| 10/05/1976 | US3984835 Homodyne communication system |
| 10/05/1976 | US3984778 Carrier recovery scheme for a SSB-SC signal |
| 10/05/1976 | US3984776 Signal quality detector |
| 09/28/1976 | US3983491 Television channel indicator |
| 09/28/1976 | US3983484 Multichannel signal transmitting and receiving apparatus |
| 09/28/1976 | US3983483 Communications device arranged to be worn in intimate contact with the body of a user |
| 09/28/1976 | US3983396 Apparatus for adjusting the filament current of an X-ray tube |
| 09/28/1976 | US3983340 Automatic span line switch |
| 09/21/1976 | US3982198 Oscillators |
| 09/21/1976 | US3982186 FM receiver with detector for multi-path reception |
| 09/21/1976 | US3982080 Automatic cable balancing network |
| 09/07/1976 | US3979720 Apparatus for monitoring a redundant multi-channel analog system |
| 09/07/1976 | US3979679 FM demodulator having squelch circuit using bucket brigade delay line |
| 09/07/1976 | US3979599 Operatively interlocked electronic system |
| 08/31/1976 | US3978410 Aircraft-mounted crash-activated transmitter device |
| 08/31/1976 | US3978409 Signal compressors and expanders |
| 08/31/1976 | US3978407 Fast start-up adaptive equalizer communication system using two data transmission rates |
| 08/24/1976 | US3977023 Tape recorder |
| 08/24/1976 | US3976842 Analog rate changer |
| 08/17/1976 | US3975688 Television shut-off device |
| 08/10/1976 | US3974450 Dual frequency FM receiver |
| 08/03/1976 | US3973224 Tandem configuration for EMP protection |
| 08/03/1976 | US3973204 YIG tuned mixer |
| 08/03/1976 | US3973203 Carrier isolation system |
| 08/03/1976 | US3973202 Portable electronic system for use with a direct current source having a ground of either positive or negative polarity |
| 08/03/1976 | US3973089 Adaptive hybrid circuit |
| 08/03/1976 | US3973088 Wide-band hybrid network |
| 07/27/1976 | US3972010 Compressors, expanders and noise reduction systems |
| 07/27/1976 | US3971998 Recursive detector-oscillator circuit |
| 07/27/1976 | US3971992 Apparatus for presetting receivers of the synthesizing type |
| 07/27/1976 | US3971988 AM/FM receiver using spectral parameter estimators |
| 07/27/1976 | US3971986 Remote control system for radio receiver |
| 07/27/1976 | US3971985 Automatic control system for condition-responsively switching over transceiver and radio or tape recorder audio signals |
| 07/20/1976 | US3970939 Signal generating and transmitting apparatus |
| 07/20/1976 | US3970937 Modem for a suppressed carrier communications system |
| 07/20/1976 | US3970805 Active hybrid circuit |
| 07/20/1976 | US3969796 Releasable fastening arrangement for a radio housing and a battery housing |
| 07/13/1976 | US3969680 Automatic dynamic compander system |
| 07/13/1976 | US3969675 Single side-band radio |
| 07/13/1976 | US3969673 Personal radio station |
| 07/06/1976 | US3968447 Method of amplitude-frequency conversion and a converter which operates in accordance with said method |
| 07/06/1976 | US3968442 Receiver tuning circuit |
| 07/06/1976 | US3968439 Radio receiver having a preselection circuit tuned by a varactor with a variable limiter threshold circuit to attenuate large amplitude signals |
| 07/06/1976 | US3968436 Apparatus for testing the operability of emergency vehicular radio transmitters |
| 07/06/1976 | US3968411 Transmitter-receiver protection device |
| 06/29/1976 | US3967219 Signal compressors and expanders |
| 06/29/1976 | US3967062 Method and apparatus for encoding data and clock information in a self-clocking data stream |
| 06/29/1976 | US3967061 Method and apparatus for recovering data and clock information in a self-clocking data stream |
| 06/29/1976 | US3967058 Two wires time sharing two way full duplex communication system |
| 06/22/1976 | US3965447 Synthetic reactor circuit |
| 06/22/1976 | US3965441 Parallel resonant circuit with feedback means for increasing Q |
| 06/22/1976 | US3965426 Frequency modulated signal pre-amplifier with amplitude modulated signal bypass |
| 06/22/1976 | US3965421 Automatic master-slave carrier switching circuit |
| 06/22/1976 | US3964427 Survival apparatus |
| 06/15/1976 | US3964068 Window antenna and defroster for use in motor vehicle |
| 06/15/1976 | US3963989 Mixer stage for microwave receivers |
| 06/08/1976 | US3962641 Tuning apparatus |
| 06/08/1976 | US3962639 System for reducing radio communication frequency bandwidth and increasing number of channels available |
| 06/08/1976 | US3962553 Portable telephone system having a battery saver feature |
| 06/01/1976 | US3961274 Noise riding threshold |
| 06/01/1976 | US3961268 Disturbance pulse detector circuit for radio receiver blanking |
| 06/01/1976 | US3961262 FM receiver and demodulation circuit |
| 06/01/1976 | US3961203 Signal correlator |
| 05/25/1976 | US3959729 Electro-optic tuning indicator |
| 05/25/1976 | US3959597 Delay line time compressor and expander |
| 05/18/1976 | US3958181 Disturbance signal detector for blanking circuit control |
| 05/18/1976 | US3958133 Digital noise discriminator |
| 05/11/1976 | US3956719 Variable band pass filter circuit |
| 05/11/1976 | US3956701 Personal paging receiver with swivel clip and distributed antenna |
| 05/11/1976 | US3956594 Indicating circuit for an FM stereophonic signal receiver |
| 05/11/1976 | US3956578 Facsimile system for the transmission of picture |
| 05/04/1976 | US3955144 Feedback system for pulse transmitters |
| 05/04/1976 | US3955143 Single sideband generator of bi-level signals |
| 04/27/1976 | US3953802 Adjacent channel rejector |
| 04/27/1976 | US3953800 Tuning indicator for a radio frequency receiver |
| 04/20/1976 | US3952161 Audio processor circuit for an FM-stereo radio receiver |
| 04/20/1976 | US3952154 Automatic audio source selector for stereo entertainment center |
| 04/13/1976 | US3950702 Circuits for detecting trigger signals for use in synthesizing type receivers |
| 04/13/1976 | US3950701 Rear view mirror for a two-wheeled vehicle |
| 04/13/1976 | US3950607 Bandwidth compression system and method |