Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851277 | Composite matting with reinforcement | Brand C. Valkenburg, Stephanus A. G. de Graaf, Rolf Vollbrecht | 1989-07-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851277 | Composite matting with reinforcement | Brand C. Valkenburg, Stephanus A. G. de Graaf, Rolf Vollbrecht | 1989-07-25 |