Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6645283 | Anthrapyridone compounds, water-based magenta ink composition, and method of ink-jet printing | Hiroyuki Matsumoto, Takafumi Fujii, Yasuo Shirasaki | 2003-11-11 |
| 6589325 | Phthalocyanine compounds, water-base ink compositions and colored products | Yoshinori Katoh, Yasuo Shirasaki | 2003-07-08 |