Issued Patents 2022
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11273076 | Acoustic valve and ear plug for hearing protection | Engbert Wilmink | 2022-03-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11273076 | Acoustic valve and ear plug for hearing protection | Engbert Wilmink | 2022-03-15 |