Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819541 | Control of a double-action pneumatic drive | Hans E. Winkelmann, Helmut W. Frohnheiser, Guenther Herbert | 1989-04-11 |
| 4771160 | Welding tongs | Lothar Ulrich | 1988-09-13 |