Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8182596 | Discolorable ink composition and writing utensils | Hiroshi Inoue | 2012-05-22 |
| 8080098 | Water-based ink composition | Shoko Matsumoto, Kyoko Sano, Yasunori Nakatani, Hiroyoshi Yamamoto, Kozaburo Fujita +4 more | 2011-12-20 |
| 7914222 | Tip unit for liquid applicator, method for producing the same, and liquid applicator having the tip unit | Hiroshi Inoue, Shoko Matsumoto, Kyoko Sano, Takeshi Omatsu, Shigeki Yoneda +3 more | 2011-03-29 |
| 7721402 | Method of producing applicator tip | Hiroshi Inoue, Shoko Matsumoto, Kyoko Sano, Takeshi Omatsu, Shigeki Yoneda +3 more | 2010-05-25 |
| 7538148 | Aqueous ink composition | Hiroshi Inoue, Shoko Matsumoto, Kyoko Sano, Takeshi Omatsu, Shigeki Yoneda +3 more | 2009-05-26 |
| 7371785 | Erasable ink composition | Yasuyuki Yoshimura, Atsushi Sudo, Norihiro Hirano, Isao Enjon | 2008-05-13 |
| 6666913 | Aqueous ink composition | Norihiro Hirano, Atsushi Sudo, Yasuyuki Yoshimura | 2003-12-23 |
| 6325845 | Aqueous ink for ball point pens | Hiroshi Inoue | 2001-12-04 |