Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5930047 | Anti-glare device | Stefan Gunz, Donata Gunz-Castelberg | 1999-07-27 |
| 5444232 | Antiglare device to protect eyes during welding and immediately thereafter for a time based on the intensity and duration of the welding light | Stefan Gunz, Livio Ghisleni | 1995-08-22 |