Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5291291 | ATV television system with reduced co-channel NTSC interference | — | 1994-03-01 |
| 5086340 | Co-channel interference reduction system for digital high definition television | Richard W. Citta | 1992-02-04 |
| 4688246 | CATV scrambling system with compressed digital audio in synchronizing signal intervals | Ronald Lee, Rudolf Turner | 1987-08-18 |
| 4405944 | TV Sound transmission system | Pieter Fockens | 1983-09-20 |
| 4339772 | TV Sound Transmission system | Pieter Fockens | 1982-07-13 |