Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840550 | Internal axis rotary piston engine with protrusions having two sealing corners | Hans Baumgartner, Ulrich Henke | 1989-06-20 |
| 4822260 | Device for controlling fluid supply to a rotary piston machine | Hans Baumgartner, Ulrich Henke, Klaus Heikrodt, Herbert Schneider | 1989-04-18 |