Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4931369 | Contact arrangement for the battery of an in-ear hearing aid | Rudolf Wandle | 1990-06-05 |
| 4657106 | """Ear"" hearing aid" | — | 1987-04-14 |
| 4607720 | Hearing aid | — | 1986-08-26 |