Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810302 | Azo pigment composition | Mikio Hayashi, Yoshitaka Ohtomo | 1989-03-07 |
| 4601759 | Pigment compositions, method for producing same, and colored resin compositions | Toshio Furubayashi, Yoichi Inuzuka, Osamu Aihara, Mikio Hayashi | 1986-07-22 |
| 4301049 | Method of producing an azo pigment suitable for use in a gravure printing ink and azo pigments produced thereby | Masuhiko Maejima, Yoichi Inuzuka, Kosaku Tsuji | 1981-11-17 |
| 4221606 | Phthalocyanine pigment compositions | Yoichi Inuzuka, Tetsuo Mishina, Kenji Kitamura, Ataru Chiba | 1980-09-09 |