Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4804620 | Photographic material containing a novel polymeric dye-forming coupler | Philip T. S. Lau, Stanley W. Cowan, Harold I. Machonkin, Tien-Teh Chen | 1989-02-14 |
PT
Ping-Wah Tang
Overall (1989): #68,372 of 140,708Top 50%
1
Patents 1989