Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850725 | Unidirectional ribbon drive mechanism | Alan H. Walker, Thomas J. Bossack | 1989-07-25 |
| D301739 | Electrosurgical pencil | Alexander Edward Turner, Egidio L. De Oliveira, John Scoville | 1989-06-20 |