Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10087337 | Oil-based ball-point pen refill, oil-based ball-point pen, and oil-based ball-point pen ink composition | Akihiro Shiobara, Kouichi Takayama, Susumu Yamaguchi, Toshihide KAWASAKI, Hirotaka Masuda | 2018-10-02 |
| 7497902 | Water based ink composition for rollerball pen | — | 2009-03-03 |
| 5609432 | Ballpoint pen containing an aqueous ink composition | Takeyuki Yamamoto, Itaru Wakagi, Shinichi Murakata, Yasuzo Murata | 1997-03-11 |
| 5205862 | Water resistant ink compositions and process for preparation | Hiroshi Kiyomoto | 1993-04-27 |
| 4264373 | Method of refining beet juice | Keisuke Shinbori, Tokiya Ando, Shigeo Sakai | 1981-04-28 |