Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11273076 | Acoustic valve and ear plug for hearing protection | Engbert Wilmink | 2022-03-15 |
| 9930454 | Method and system for testing a mould shape quality of a user-customized ear mould | Engbert Wilmink | 2018-03-27 |