Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5344933 | Pyrrole ring-or condensed pyrrole ring-containing azomethine dye | Katsuyoshi Yamakawa, Kozo Sato, Koushin Matsuoka | 1994-09-06 |
| 5310634 | Color developing agent and image forming process | Mitsugu Tanaka, Kei Sakanoue | 1994-05-10 |