Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9902857 | Quinacridone pigment of low amine content and method for producing same | Kazuhiro Sugiyama, Kengo Yasui | 2018-02-27 |
| 8008391 | Aqueous pigment dispersion and aqueous pigment ink for inkjet recording | Yuuya Enomoto, Kengo Yasui, Tadashi Matsumoto | 2011-08-30 |