Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693458 | Photographic elements containing certain yellow dye-forming couplers | Bernard A. Clark, Robert Gourley, Hamish McNab | 1997-12-02 |
| 5674667 | Photographic element containing pyrroloylacetamide yellow coupler | Bernard A. Clark, Hamish McNab | 1997-10-07 |