Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6800674 | Anthraquinone compound and water-based ink-jet recording ink containing the compound | Yoriaki Matsuzaki, Tadashi Okuma, Ryu Oi | 2004-10-05 |
| 6758890 | Aqueous ink and process for producing dye | Yoriaki Matsuzaki, Kenichi Fujii, Hiroshi Naruse, Tsutami Misawa | 2004-07-06 |