Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4342668 | Photochromic compounds | Richard J. Hovey, Nori Y. C. Chu, Peter G. Piusz | 1982-08-03 |
| 4215010 | Photochromic compounds | Richard J. Hovey, Nori Y. C. Chu, Peter G. Piusz | 1980-07-29 |