| Patents for H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274) |
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| 07/11/1978 | US4100494 Dynamic control of code modulated pulse transmission |
| 07/11/1978 | US4100493 Transmission system for signal transmission by means of compressed delta modulation |
| 07/04/1978 | US4099122 Transmission system by means of time quantization and trivalent amplitude quantization |
| 05/30/1978 | US4092605 Phase delay simulator |
| 05/09/1978 | US4088831 Synchronization for PCM transmission systems |
| 04/18/1978 | US4085367 Method and detection of phase and frequency modulation |
| 04/11/1978 | US4084137 Multidimensional code communication systems |
| 03/28/1978 | US4081790 Code converter |
| 01/31/1978 | US4071842 Apparatus for analog to digital conversion |
| 01/17/1978 | US4069396 Power saving circuit for use with a converter circuit in a telephone switching installation |
| 12/06/1977 | US4061976 Receivers for pulses of different widths |
| 12/06/1977 | US4061975 Receiver for pulses of different widths |
| 11/22/1977 | US4059800 Digital multi-line companded delta modulator |
| 11/01/1977 | US4056683 Audio transmitting and receiving system |
| 10/18/1977 | US4054863 Error detection and correction system |
| 10/11/1977 | US4053834 Narrowband phase modulation communication system which eliminates thresholding |
| 09/06/1977 | US4047108 Digital transmission system for transmitting speech signals at a low bit rate, and transmission for use in such a system |
| 08/09/1977 | US4041453 Signal handling system for minimizing dropout effect |
| 08/02/1977 | US4040049 Tandem block digital processor for use with nonuniformly encoded digital data |
| 08/02/1977 | US4039999 Communication system |
| 08/02/1977 | US4039955 Receiver for the reception of signals transmitted by delta modulation |
| 08/02/1977 | US4039950 Pulse code transmitter and receiver designed to produce uniform transfer characteristics in the face of component variations |
| 08/02/1977 | US4039949 Pulse code modulation with dynamic range limiting |
| 08/02/1977 | US4039948 Multi-channel differential pulse code modulation system |
| 07/26/1977 | US4038539 Adaptive pulse processing means and method |
| 07/05/1977 | US4034305 Demodulator for signals hybrid modulated by more and less significant digit signals in succession in each clock interval |
| 06/28/1977 | US4032914 Analog to digital converter with noise suppression |
| 05/31/1977 | US4027100 Code transmission system having buffers of approximately equal capacities on both transmitting and receiving sides |
| 05/03/1977 | US4021652 Incrementally adjustable digital attenuator/amplifier |
| 04/26/1977 | US4020332 Interpolation-decimation circuit for increasing or decreasing digital sampling frequency |
| 04/26/1977 | US4020288 System for data transmission through the channels of a frequency division multiplex system |
| 04/19/1977 | US4019140 Methods and apparatus for reducing intelligible crosstalk in single sideband radio systems |
| 04/12/1977 | US4017849 Apparatus for analog to digital conversion |
| 04/05/1977 | US4016410 Signal processor with digital filter and integrating network |
| 03/22/1977 | US4013966 Fm rf signal generator using step recovery diode |
| 03/15/1977 | US4012696 Multiple rate digital command detection system with range clean-up capability |
| 03/01/1977 | US4010422 Transmitter for forming non-linear pulse code modulated samples of analog signals by timing the integral of signal samples |
| 02/15/1977 | US4008378 Multi-radix digital communications system with time-frequency and phase-shift multiplexing |
| 02/08/1977 | US4007360 Method and apparatus for remote transmission of signals |
| 02/01/1977 | US4005818 Pulse signaling system |
| 01/25/1977 | US4005411 Compression of gray scale imagery to less than one bit per picture element |
| 01/25/1977 | US4005406 Digital-analog converter |
| 01/25/1977 | US4005274 Pulse-code modulation communication system |
| 01/18/1977 | US4004082 Method and system for multiplexing signal for transmission |
| 01/11/1977 | US4002981 Digital converter from delta-modulated signals into PCM signals |
| 01/11/1977 | US4002840 Angle-modulated signal transmission system |
| 12/21/1976 | US3999129 Method and apparatus for error reduction in digital information transmission systems |
| 11/30/1976 | US3995218 Adaptive delta modulation system for correcting mistracking |
| 11/30/1976 | US3995217 Method and apparatus for suppressing background noise in a digital telephone system |
| 11/23/1976 | US3993954 Electric communication system |
| 11/09/1976 | US3991269 Digital coding without additional bits to provide sign information |
| 11/02/1976 | US3990011 Method and apparatus for determining AM modulation factor |
| 10/05/1976 | US3984829 Circuit arrangement for converting analog signals into PCM signals and PCM signals into analog signals |
| 09/14/1976 | US3981005 Transmitting apparatus using A/D converter and analog signal compression and expansion |
| 09/14/1976 | US3980971 Modulator for hybrid modulation by more and less significant digital signals in succession in each clock interval and counterpart demodulator |
| 09/07/1976 | US3979721 Pulse code modulation recording and reproducing apparatus |
| 09/07/1976 | US3979676 Delta modulation apparatus |
| 08/17/1976 | US3975686 Loss signal generation for delta-modulated signals |
| 08/10/1976 | US3974339 Method of transmitting digital information in a time-division multiplex telecommunication network |
| 08/03/1976 | US3973199 Prediction differential pulse code modulation system with adaptive compounding |
| 07/27/1976 | US3971987 Gain method and apparatus for a delta modulator |
| 06/08/1976 | US3962638 Data transmission over voice bandwidth of FM radio channel |
| 06/08/1976 | US3962636 Device for converting an incoming analog signal into an outgoing PCM signal |
| 05/25/1976 | US3959586 Frequency burst communication system |
| 05/11/1976 | US3956699 Electromagnetic wave communication system with variable polarization |
| 04/27/1976 | US3953803 Measuring system |
| 04/27/1976 | US3953798 Method and device for radio transmission of binary data signals |
| 04/06/1976 | US3949299 Signal coding for telephone communication system |
| 04/06/1976 | US3949298 Time shared delta modulation system |
| 04/06/1976 | US3949170 Signal transmitting system including A-D and D-A converters |
| 03/16/1976 | US3945002 Block digital processor for use with nonuniformly encoded digital words |
| 03/02/1976 | US3942126 Band-pass filter for frequency modulated signal transmission |
| 02/10/1976 | US3937897 Signal coding for telephone communication system |
| 01/13/1976 | US3932698 Multiplex signal transmission system |