Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875643 | Starter arrangement for a helicopter | Staas Gietzen, Hans Weiner, Klaus Hain, August Hofbauer | 1989-10-24 |
| 4872624 | Drive arrangement for a vehicle having a propeller | Kim Havemann, Rolf V. Sivers | 1989-10-10 |