Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5327794 | Device for driving a tool positioned on a pivotable part | — | 1994-07-12 |
| 5257593 | Floating construction assembled from several parts | Willem Groen | 1993-11-02 |
| RE32382 | Digging wheel for a suction dredger vessel | Jan Asselbergs | 1987-03-31 |
| 4302893 | Digging wheel for a suction dredger vessel | Jan Asselbergs | 1981-12-01 |