Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4692529 | Method for synthesizing a magenta coupler by selectively etherifying 4-hydroxy-5-pyrazolone | Ryosuke Sato, Fumio Ishii, Kazuhiko Kimura, Hidetaka Ninomiya | 1987-09-08 |