Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4696033 | One-piece telephone hook switch operating mechanism | — | 1987-09-22 |
| 4348711 | Method and apparatus for implanting a charge in an electret foil | Michael O'Sullivan | 1982-09-07 |
| 4249043 | Electret transducer backplate, electret transducer and method of making an electret transducer | Adrian Morgan, John K. Williams | 1981-02-03 |