Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8139801 | Hearing aid glasses using one omni microphone per temple | Marcus Karel Sipkema | 2012-03-20 |
| 7735996 | Connector assembly for connecting an earpiece of a hearing aid to glasses temple | Marcus Karel Sipkema | 2010-06-15 |