| Patents for H03C 5 - Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal (621) |
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| 08/02/1988 | US4761798 Baseband phase modulator apparatus employing digital techniques |
| 05/24/1988 | US4747159 For converting video and audio signals to modulated signal outputs |
| 03/15/1988 | US4731796 Multi-mode radio transceiver |
| 12/08/1987 | EP0167531A4 Packetized ensemble modem. |
| 05/07/1986 | EP0180339A2 A multi-mode radio transceiver |
| 04/22/1986 | US4584541 Digital modulator with variations of phase and amplitude modulation |
| 01/15/1986 | EP0167531A1 Packetized ensemble modem. |
| 09/11/1985 | EP0154318A1 High frequency modulation circuit |
| 07/18/1985 | WO1985003180A1 Packetized ensemble modem |
| 06/04/1985 | US4521749 Simultaneous amplitude and angle modulation using detection of complex zeroes |
| 09/26/1984 | EP0119627A2 Modulator circuit realized as a switched capacitor filter |
| 07/21/1981 | CA1105575A1 Amplitude and frequency modulation system |
| 08/12/1980 | US4217467 Amplitude and periodic phase modulation transmission system |
| 11/13/1979 | CA1066362A1 Methods and apparatus for reducing intelligible crosstalk in single sideband radio systems |
| 10/09/1979 | US4170764 Amplitude and frequency modulation system |
| 10/04/1979 | WO1979000718A1 Amplitude and frequency modulation system |
| 09/19/1979 | EP0004046A1 Apparatus for amplitude and frequency modulating a signal |
| 09/04/1979 | US4166923 Amplitude- and periodic phase-modulation transmission system |
| 01/09/1979 | US4134114 Radar system having amplitude and phase modulation and demodulation circuits |
| 04/19/1977 | US4019140 Methods and apparatus for reducing intelligible crosstalk in single sideband radio systems |
| 01/11/1977 | US4003003 Multichannel digital synthesizer and modulator |