Issued Patents 1997
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698141 | Photochromic heterocyclic fused indenonaphthopyrans | — | 1997-12-16 |
| 5658500 | Substituted naphthopyrans | David B. Knowles, Barry Van Gemert | 1997-08-19 |
| 5658501 | Substituted naphthopyrans | David B. Knowles, Barry Van Gemert | 1997-08-19 |
| 5656206 | Substituted naphthopyrans | David B. Knowles, Barry Van Gemert | 1997-08-12 |
| 5651923 | Substituted naphthopyrans | David B. Knowles, Barry Van Gemert | 1997-07-29 |
| 5650098 | Substituted naphthopyrans | David B. Knowles, Barry Van Gemert | 1997-07-22 |
| 5637262 | Photochromic substituted naphthopyran compounds | Barry Van Gemert | 1997-06-10 |