Issued Patents All Time
Showing 101–120 of 120 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5579390 | Method and apparatus for vertically scrambling and descrambling of video signals | John O. Ryan, James R. Holzgrafe, Peter Wonfor | 1996-11-26 |
| 5504815 | Method and apparatus for scrambling and descrambling | John O. Ryan, James R. Holzgrafe, Peter Wonfor | 1996-04-02 |
| 5471531 | Method and apparatus for low cost audio scrambling and descrambling | — | 1995-11-28 |
| 5438620 | Method and apparatus for scrambling and descrambling of video signal with edge fill | John O. Ryan, James R. Holzgrafe, Peter Wonfor | 1995-08-01 |
| 5229735 | Wide frequency deviation voltage controlled crystal oscillator having plural parallel crystals | — | 1993-07-20 |
| 5194965 | Method and apparatus for disabling anti-copy protection system in video signals | John F. Peruzzi | 1993-03-16 |
| 5159631 | Audio scrambling system using in-band carrier | Ali R. Hakimi | 1992-10-27 |
| 5157510 | Method and apparatus for disabling anti-copy protection system in video signals using pulse narrowing | John F. Peruzzi | 1992-10-20 |
| 5095279 | Variable frequency sine wave carrier signal generator | Ali R. Hakimi | 1992-03-10 |
| 5058159 | Method and system for scrambling and descrambling audio information signals | — | 1991-10-15 |
| 4963764 | Low noise current mirror active load circuit | — | 1990-10-16 |
| 4963756 | Focused line identifier for a bar code reader | Brian J. Bayley | 1990-10-16 |
| 4740675 | Digital bar code slot reader with threshold comparison of the differentiated bar code signal | Michael J. Brosnan | 1988-04-26 |
| 4682015 | Low powered high ambient light bar code reader circuit | — | 1987-07-21 |
| 4588909 | Distortion compensating circuit | — | 1986-05-13 |
| 4544943 | Stabilized color television subcarrier regenerator circuit | — | 1985-10-01 |
| 4516041 | Voltage controlled variable capacitor | — | 1985-05-07 |
| 4458213 | Constant quiescent current, class AB amplifier output stage | — | 1984-07-03 |
| 4333108 | Apparatus and method for transmitting a pulse width modulated audio signal on a video signal | John O. Ryan | 1982-06-01 |
| 4297620 | Quasi feedback horizontal scan linearization for cathode ray tubes | — | 1981-10-27 |