| Patents for H04B 3 - Line transmission systems (31,523) |
|---|
| 03/09/1976 | US3943447 Method and apparatus for bi-directional communication via existing CATV system |
| 03/09/1976 | US3943305 Telephone line control system |
| 03/02/1976 | US3942170 Distribution network powerline carrier communication system |
| 03/02/1976 | US3942168 Distribution network power line communication system |
| 03/02/1976 | US3942137 Device for the remote adjustment of an inaccessible element |
| 03/02/1976 | US3942116 Transceiver having improved voice actuated carrier and echo suppression circuit |
| 03/02/1976 | US3941950 Telephone line testing instrument having a supervising capability |
| 03/02/1976 | US3941948 Four-wire interface regulator for long distance trunk circuits |
| 02/24/1976 | US3940703 Intermodulation distortion analyzer |
| 02/10/1976 | US3938129 Power line data transmission system |
| 02/10/1976 | US3938057 Telecommunications signal amplifier |
| 02/10/1976 | US3937907 Digital echo suppressor |
| 02/03/1976 | US3936762 Digital phase-lock loop systems for phase processing of signals |
| 02/03/1976 | US3936700 Electronic overcurrent protection of a DC data transmission circuit |
| 02/03/1976 | US3936610 Dual delay line storage sound signal processor |
| 01/27/1976 | US3935550 Group delay equaliser |
| 01/27/1976 | US3935535 Fast equalization acquisition for automatic adaptive digital modem |
| 01/27/1976 | US3935480 Broad band directional signal generator |
| 01/27/1976 | US3935403 Device for developing a neutralization signal for an echo suppressor |
| 01/20/1976 | US3934099 Bias, feedback and network arrangements for hybrid circuits |
| 01/13/1976 | US3932818 Spectrum notcher |
| 01/13/1976 | US3932804 Neutralizing transformer arrangement |
| 01/13/1976 | US3932712 Telephone transmission system |