Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820304 | Speech prosthesis device | William A. Depel | 1989-04-11 |
| 4610691 | Voice prosthesis device | William A. Depel, Jerald B. Moon | 1986-09-09 |
| 4582058 | Tracheostoma valves | William A. Depel, Jerald B. Moon | 1986-04-15 |