Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5544158 | Method for multiple access in a digital communication system | Dan Oprea | 1996-08-06 |
| 4293737 | Ringing decoder circuit | — | 1981-10-06 |
| 4219700 | Partyline subscriber interface circuit | Guido Panizzon, Michael C. J. Cowpland, Paul S. Wilker | 1980-08-26 |
| 4204094 | Tone applying line circuit | — | 1980-05-20 |