Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880216 | Two-chamber engine bearing which has hydraulic damping | Volker Hartel, Gunter Oppermann | 1989-11-14 |
| 4618128 | Two-chamber engine bearing which has hydraulic damping | Volker Hartel | 1986-10-21 |