Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4647026 | Pneumatic or hydropneumatic tension spring | Martin Siemann | 1987-03-03 |
| 4309027 | Pneumatic spring having selectively releasable rod-retaining structure | Werner Molders | 1982-01-05 |