Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5686234 | Photographic element containing a coupler capable of releasing a photographically useful group | William J. Begley, Teh-Hsuan Chen, Frank D. Coms | 1997-11-11 |
| 5670301 | Photographic element containing a coupler capable of releasing a photographically useful group | William J. Begley, Teh-Hsuan Chen, Frank D. Coms | 1997-09-23 |