Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851277 | Composite matting with reinforcement | Brand C. Valkenburg, Stephanus A. G. de Graaf, Rolf Vollbrecht | 1989-07-25 |
| 4296517 | Portable spinneret cleaner | Hans Jordon | 1981-10-27 |