Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6741713 | Directional hearing device | M. M. Boone, I. L. D. M. Merks | 2004-05-25 |
| 6169810 | Electroacoustic transducer | E. Wilmink, M. de Blok, O. Geschiere, J. M. van Doorn | 2001-01-02 |
| 5757947 | Transducer | Onno Geschiere | 1998-05-26 |