Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8295505 | Earphone with controllable leakage of surrounding sound and device therefor | Erwin Weinans, Rene Hin, Johan Schreuder | 2012-10-23 |
| 8213647 | Electroacoustic device | Casper van der Bilt, Angelique Hofstede, Hedzer Michiel Adriaan Van Der Kamp | 2012-07-03 |