Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5957211 | Shut-off device for ducts and the like | Stefan Geuken | 1999-09-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5957211 | Shut-off device for ducts and the like | Stefan Geuken | 1999-09-28 |