Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6669183 | Spring element of elastic material | — | 2003-12-30 |
| 6274211 | Kinetic energy absorbing element | — | 2001-08-14 |
| 4660811 | Synthetic-resin compression spring | Dieter Muhlhahn, Gino Marsella, Dieter Simons, Horst Schafer, Hermann Haarkotter | 1987-04-28 |