Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5656674 | Method for working up waste materials | — | 1997-08-12 |
| 5487620 | Draining pavement element, method for manufacturing it and pavement made with it | — | 1996-01-30 |
| 4588046 | Device for lowering a load along a line | Abram P. van der Neer | 1986-05-13 |