Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4553627 | Hearing aid wax guard | William J. Gastmeier | 1985-11-19 |
| 4539439 | Plugs, receptacles and hearing aids | Rolf Strothmann | 1985-09-03 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4553627 | Hearing aid wax guard | William J. Gastmeier | 1985-11-19 |
| 4539439 | Plugs, receptacles and hearing aids | Rolf Strothmann | 1985-09-03 |