Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667946 | Photographic material containing magenta dye forming coupler | Bernard A. Clark, Paul L. Stanley, Christina M. Watts, Stephen P. Singer | 1997-09-16 |
| 5641613 | Photographic element containing an azopyrazolone masking coupler exhibiting improved keeping | Stephen P. Singer | 1997-06-24 |