Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6858069 | Black aqueous ink composition, ink jet recording process using the same, and recorded matter | Tetsuya Aoyama, Kazuhiko Kitamura, Hiroshi Fukumoto, Shuji Sugawara, Makiko Matsui | 2005-02-22 |
| 6632932 | Trisazo compound | Makiko Matsui, Shuji Sugawara | 2003-10-14 |
| 5795970 | Mixed disazo-dye composition and black aqueous ink composition containing the same that provides high grade image on print | Takashi Ono, Tatsuya Yagyu, Masaki Sasaki, Miharu Kanaya, Hiroko Hayashi +2 more | 1998-08-18 |
| 5667571 | Solvent-based black ink composition | Takashi Ono, Tatsuya Yagyu | 1997-09-16 |
| 5616174 | Ink composition and ink jet recording method using the same | Miharu Kanaya, Akio Owatari, Junko Takatsuna, Masahiro Yatake, Hiroko Hayashi +2 more | 1997-04-01 |
| 5340929 | Trisazo dye and dye composition containing the same | Takashi Ono, Tatsuya Yagyu, Masaki Yonezawa | 1994-08-23 |
| 5336763 | Trisazo dye and dye composition containing the same | Takashi Ono, Tatsuya Yagyu, Masaki Yonezawa | 1994-08-09 |