Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5803962 | Disazo pigment composition and printing ink | Nagatoshi Kobayashi, Sadayuki Tomioka, Shigeto Aoki | 1998-09-08 |
| 5084106 | Monoazo lake pigment | Nagatoshi Kobayashi | 1992-01-28 |
| 5055564 | Modified crystalline monoazo lake pigment | Nagatoshi Koyayashi | 1991-10-08 |
| 4767844 | Azo lake pigments | Zenji Takada, Shigeto Aoki, Yuko Shigeta | 1988-08-30 |
| 4711674 | Non-bronzing reddish lake pigment | Zenji Takada, Yuko Shigeta | 1987-12-08 |
| 4371467 | Process for producing isoindolinone pigments | Naoki Furukawa | 1983-02-01 |