Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5851748 | Photographic materials and process comprising a particular acylacetanilide yellow dye-forming coupler | Ping-Wah Tang, Stanley W. Cowan, Thomas A. Rosiek | 1998-12-22 |
| 5698386 | Photographic dye-forming coupler, emulsion layer, element, and process | Ping-Wah Tang, Susan M. Fischer, Stanley W. Cowan | 1997-12-16 |
| 5609996 | Photographic emulsion layer containing pyrazoloazole coupler exhibiting improved dye light fade | Ping-Wah Tang, Stanley W. Cowan, Terrence C. Mungal | 1997-03-11 |
| 5576150 | Photographic dye-forming coupler, emulsion layer, element, and process | Ping-Wah Tang, Stanley W. Cowan, Daniel E. Corcoran | 1996-11-19 |
| 5441863 | Photographic elements with heterocyclic cyan dye-forming couplers | Ping-Wah Tang, Thomas H. Jozefiak | 1995-08-15 |