Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5116113 | Laser eye protective devices | — | 1992-05-26 |
| 5000878 | Photochromic articles with thermally stable photocolorability | — | 1991-03-19 |
| 4720356 | Photochromic composition resistant to fatigue | — | 1988-01-19 |
| 4699473 | Trifluoromethyl substituted spirooxazine photochromic dyes | — | 1987-10-13 |
| 4440672 | Photochromic composition resistant to fatigue | — | 1984-04-03 |
| 4367170 | Stabilized photochromic materials | Donald R. Uhlmann, Elias Snitzer, Richard J. Hovey | 1983-01-04 |
| 4342668 | Photochromic compounds | Richard J. Hovey, Peter G. Piusz, Charles H. Fuchsman | 1982-08-03 |
| 4215010 | Photochromic compounds | Richard J. Hovey, Peter G. Piusz, Charles H. Fuchsman | 1980-07-29 |