Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4630962 | Drainage channel with locking grate | Roland Thomann, Heinz Witschi, Markus-Christian Amann | 1986-12-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4630962 | Drainage channel with locking grate | Roland Thomann, Heinz Witschi, Markus-Christian Amann | 1986-12-23 |