Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5735371 | Cylinder piston device | Helmut Morgen, Heinrich Spurzem, Stefan Volpel | 1998-04-07 |
| 5485987 | Cylinder piston device | Helmut Morgen, Heinrich Spurzem, Stefan Volpel | 1996-01-23 |
| 5248131 | Spring device | — | 1993-09-28 |