Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7232480 | Modified carbon black carbon black dispersion liquid and water base ink | Masayuki Momose, Miharu Kanaya, Tatsuya Yagyu | 2007-06-19 |
| 7220304 | Modified carbon black dispersion liquid and water base ink containing the same | Masayuki Momose, Miharu Kanaya, Tatsuya Yagyu | 2007-05-22 |
| 6468342 | Aqueous pigment dispersion and process for producing the same | Tatsuya Yagyu, Nobuyuki Murai, Makiko Matsui | 2002-10-22 |
| 6099632 | Aqueous pigment ink composition | Toshiyuki Nagasawa, Tetsuji Kihara | 2000-08-08 |
| 5905102 | Aqueous black ink composition for writing board | Toshiyuki Nagasawa, Tetsuji Kihara | 1999-05-18 |
| 5861447 | Aqueous pigment ink composition | Toshiyuki Nagasawa, Aiko Okamura | 1999-01-19 |
| 5846307 | Aqueous pigment ink composition | Toshiyuki Nagasawa, Yoichi Ueda | 1998-12-08 |
| 5718746 | Process of producing aqueous pigment ink | Toshiyuki Nagasawa, Tetsuji Kihara | 1998-02-17 |