Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4722507 | Piston sealing ring apparatus | Willy V. D. Weydt | 1988-02-02 |
| 4671321 | Control organ for gaseous and liquid media | Herbert K. Paetzel, Lothar H. M. Grutesen | 1987-06-09 |