Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4927538 | Purification of C.I. solvent black 3 | Masahiro Otsuka | 1990-05-22 |
| 4822424 | Hexakisazo dyes-containing aqueous compositions | Sadahiko Matsubara, Tamotsu Naito | 1989-04-18 |
| 4758659 | Hexakisazo dyes | Sadahiko Matsubara, Tamotsu Naito | 1988-07-19 |
| 4656113 | Dye composition and use thereof | Tetsuya Ohshima, Takeshi Matsuyama, Yoji Kawagishi, Takuo Andoh, Takashi Kiryu | 1987-04-07 |
| 4568624 | Toner composition having a dye composition | Tetsuya Ohshima, Takeshi Matsuyama, Yoji Kawagishi, Takuo Andoh, Takashi Kiryu | 1986-02-04 |
| 4407924 | Toner complexes for developing electrostatic images | Kazuhiro Ishikawa, Yukihiko Ishida, Yoji Kawagishi | 1983-10-04 |