Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4478293 | Hammer drill or chipping hammer | Walter Weilenmann, Peter Hirt | 1984-10-23 |
| 4365961 | Friction clutch including rolling bodies for transmitting a limited torque | Walter Weilenmann | 1982-12-28 |