Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6160035 | Oil-base pigment ink composition for writing tools | — | 2000-12-12 |
| 5965634 | Water base ink composition | Yasuaki Ogiwara, Atsushi Iwasa, Kiyokazu Sakurai | 1999-10-12 |
| 5942560 | Colored resin fine particle water base dispersion liquid for water base ink | Yasuaki Ogiwara, Atsushi Iwasa, Kiyokazu Sakurai | 1999-08-24 |
| 5498281 | Recording material containing carbonaceous powder whose surface is modified with fluorine gas | Atsushi Wakata, Nobuatsu Watanabe, Yong-Bo Chong | 1996-03-12 |
| 5437715 | Recording material containing carbonaceous powder whose surface is modified with fluorine gas | Atsushi Wakata, Nobuatsu Watanabe, Yong-Bo Chong | 1995-08-01 |