Issued Patents 1994
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5360713 | Yellow dye-forming couplers and color photographic elements containing these couplers | Ping-Wah Tang, Philip T. S. Lau | 1994-11-01 |
| 5360710 | Color photographic materials containing polymeric couplers | Tien-Teh Chen, Edward Schofield, Ping-Wah Tang | 1994-11-01 |
| 5358835 | Photographic elements containing new yellow-dye-forming tris couplers | Ping-Wah Tang, Philip T. S. Lau | 1994-10-25 |
| 5358836 | Photographic elements containing new magenta-dye-forming tris couplers | Ping-Wah Tang, Philip T. S. Lau | 1994-10-25 |
| 5358838 | Photographic elements containing new yellow-dye-forming tris couplers | Ping-Wah Tang, Philip T. S. Lau | 1994-10-25 |
| 5358837 | Photographic elements containing new magenta-dye-forming bis couplers | Ping-Wah Tang, Terrence C. Mungal, Philip T. S. Lau | 1994-10-25 |
| 5358829 | Photographic material and process comprising a bicyclic pyrazolo coupler | Ping-Wah Tang | 1994-10-25 |
| 5340708 | Photographic elements containing new dye-forming tris couplers | Ping-Wah Tang, Philip T. S. Lau | 1994-08-23 |