Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5623005 | Photochromic naphthopyran compounds | Katharine E. Smith, Christopher David Gabbutt, John David Hepworth | 1997-04-22 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5623005 | Photochromic naphthopyran compounds | Katharine E. Smith, Christopher David Gabbutt, John David Hepworth | 1997-04-22 |