Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4696287 | Transmission system for implanted hearing aids | Guenther Hortmann, Hans Fenner | 1987-09-29 |
| 4611598 | Multi-frequency transmission system for implanted hearing aids | Guenter Hortmann | 1986-09-16 |