Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5269638 | Spherical pipe switch with single channel or double channel cock | Eugen Rost | 1993-12-14 |
| 5207536 | Pipe switch with externally arranged drive unit | Walter Beirle, Martin Frank | 1993-05-04 |