Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808096 | Axial sealing system of a rotary piston engine | Dankwart Eiermann | 1989-02-28 |
| 4796360 | Motor-driven chain saw with a sprocket guide | Klaus Dussler, Wilfried Linke, Werner Hartmann | 1989-01-10 |