Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5143385 | Shaft seal | Waldemar Wachowitz | 1992-09-01 |
| 4861536 | Method for manufacturing a sealing ring | Gunter Graf, Heinz Gross | 1989-08-29 |
| 4850097 | Method for the manufacture of a sealing ring with a sealing lip having hydrodynamically acting return elements | Gunter Graf, Heinz Gross | 1989-07-25 |