Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6130032 | Photographic elements containing improved yellow dye-forming couplers | Ping-Wah Tang, James H. Reynolds | 2000-10-10 |
| 5576150 | Photographic dye-forming coupler, emulsion layer, element, and process | Ping-Wah Tang, Stanley W. Cowan, David J. Decker | 1996-11-19 |