Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6190848 | Color photographic element containing ballasted triazole derivative and inhibitor releasing coupler | Bernard A. Clark, Louis E. Friedrich, Stephen P. Singer | 2001-02-20 |
| 6140029 | Color photographic element containing elemental silver and nitrogen heterocycle in a non-light sensitive layer | Bernard A. Clark, Philip A. Allway, Louis E. Friedrich, Stephen P. Singer | 2000-10-31 |
| 6054257 | Photographic element containing particular coupler and inhibitor releasing coupler | Bernard A. Clark, Louis E. Friedrich, Stephen P. Singer | 2000-04-25 |
| 6010837 | Silver halide photographic element comprising image dye-forming couplers | Bernard A. Clark, Michael W. Crawley, Christina M. Watts, Stephen P. Singer, Paul L. Stanley | 2000-01-04 |
| 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 |