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Patent applications and USPTO patent grants for Kappeler; Otmar.The latest application filed is for "frequency converting apparatus for converting an rf television signal to a video signal employing low if techniques".
Patent | Date |
---|---|
Frequency converting apparatus for converting an RF television signal to a video signal employing low IF techniques Grant 4,789,897 - Kappeler , et al. December 6, 1 | 1988-12-06 |
Television sound receiving circuit for at least one sound channel contained in an RF signal Grant 4,710,814 - Gassmann , et al. December 1, 1 | 1987-12-01 |
Generator circuit for generating two sinusoidal signals with a phase difference of 90 degrees Grant 4,683,444 - Kappeler July 28, 1 | 1987-07-28 |
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