Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848555 | Twin-disc clutch | Hans-Walter Riese, Winfried Sturmer, Reinhold Ruppel | 1989-07-18 |
| 4809835 | Releaser snap connection for a pulled-type diaphragm spring clutch | Peter Huditz, Werner Fricke, Helmuth Weissenberger | 1989-03-07 |