Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5386476 | Locking device for a hearing aid battery chamber | Nikolai Bisgaard | 1995-01-31 |
| 4564955 | Coupling for use in the securing of a hook-shaped sound part on a behind-the-ear hearing aid | Leon Birch | 1986-01-14 |