Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6074440 | Mixture of dyes to form a black image | Akira Onishi, Tatsuo Tanaka, Yoriko Nakayama | 2000-06-13 |
| 5892033 | Metallic chelating dye | Tawara Komamura, Akira Onishi, Tatsuo Tanaka, Yoriko Nakayama, Norio Miura | 1999-04-06 |