Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7609842 | Spectacle hearing aid | Marcus Karel Sipkema, Marinus Marias Boone | 2009-10-27 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7609842 | Spectacle hearing aid | Marcus Karel Sipkema, Marinus Marias Boone | 2009-10-27 |