Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4456119 | Device for elevating a liquid | Henk H. in't Hout | 1984-06-26 |
| 4387519 | Method for controlling the position of the suction head of a dredge in relation to the bottom | — | 1983-06-14 |
| 4382419 | Floating vessel with moon well and ice guard therefor | Nicolaas J. van Drimmelen | 1983-05-10 |
| 4374504 | Suction dredger barge | — | 1983-02-22 |