Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5536819 | Trisazo compounds imparting deep black color a method for dyeing by using them and an ink containing them | Yuriko Tamura, Kazuya Ogino, Mahito Fujita, Takashi Omura, Hideo Kawashita | 1996-07-16 |
| 5530105 | Tetraskisazo compound and ink containing the compound | Satoshi Yamazaki, Hideo Kawashita, Kazuya Ogino, Yuriko Tamura, Takashi Omura | 1996-06-25 |
| 5489671 | Trisazo compound imparting black color, method for dyeing by using it and ink containing it | Kazuya Ogino, Yuriko Tamura, Takashi Omura, Mahito Fujita, Hideo Kawashita | 1996-02-06 |