Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11615773 | String sustainer for musical instrument | — | 2023-03-28 |
| 9555551 | Rotary shaving unit | Jan Dirk Van Den Berge, Johan Pragt, Friso Terpstra, Albert Maas De Lange, Wouter Van Kempen +1 more | 2017-01-31 |