Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5636057 | Prismatic toroidal lens and traffic signal light using this lens | Marc Hoffman | 1997-06-03 |
| 5343330 | Double refraction and total reflection solid nonimaging lens | Marc Hoffman | 1994-08-30 |