Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D310276 | Welding mask | Hans Huesler | 1990-08-28 |
| 4920257 | Light filter with automatic regulationof optical transmission | Rolf Bruhin | 1990-04-24 |
| 4863244 | Electro-optic welding lens assembly | Daniel Stanelli | 1989-09-05 |