Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6186512 | Piston ring | Norbert Deppert, Peter Wolki | 2001-02-13 |
| 5655634 | Shock absorbers and vibration dampers; and shock absorbers and vibration dampers with a piston with a piston ring; and a cyclinder with a piston with a piston ring | Manfred Grundei, Norbert Deppert, Peter Wolki | 1997-08-12 |