Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4321431 | Trunk circuit with single coupling transformer | Patrick R. Beirne, Raymond J. Whitbread | 1982-03-23 |
| 4281219 | Telephone line circuit | Patrick R. Beirne | 1981-07-28 |
| 4273965 | Tone decoding circuit | Patrick R. Beirne | 1981-06-16 |
| 4219700 | Partyline subscriber interface circuit | Guido Panizzon, Jacob Cepelinski, Paul S. Wilker | 1980-08-26 |
| 4182936 | Transformerless trunk circuit | Patrick R. Beirne, Raymond J. Whitbread | 1980-01-08 |