Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4694771 | Mooring device | Leendert Poldervaart | 1987-09-22 |
| 4686924 | Fender or similar device for absorbing forces of impact | Leendert Poldervaart, Roland P. O. Quinti | 1987-08-18 |