Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6098645 | Leak resistant, switching, double valve system | Klaus Scholz, Norbert Fischer | 2000-08-08 |
| 5645102 | Leak resistant, switching, double valve system | Norbert Schramm, Frank Baumbach | 1997-07-08 |