Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6348604 | Photochromic naphthopyrans | Anu Chopra, David B. Knowles, Barry Van Gemert, Anil Kumar | 2002-02-19 |
| 6296785 | Indeno-fused photochromic naphthopyrans | Anu Chopra, Olga G. Petrovskaia, David B. Knowles, Barry Van Gemert, Anil Kumar | 2001-10-02 |