Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6932472 | Dual complementary two-color optics which enables a user to see true neutral color, with improved shading design and shadow detail | Thomas S. Marason | 2005-08-23 |
| 6678100 | Dual complementary two-color optics which enables a user to see true neutral color | Thomas S. Marason | 2004-01-13 |