Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12358685 | Replacement lead case | Mitsuhiro Kawabata, Kyoichiro Nakamura | 2025-07-15 |
| D1045374 | Case for mechanical pencil leads | — | 2024-10-08 |
| 11112892 | Stylus pen | Masashi Sakagami, Atsunori Satake | 2021-09-07 |
| 10023756 | Solid drawing material | Huyen Nguyen Thi Thanh, Tatsuya Murata, Motohiro Kasai, Katsunori Kitazawa, Masaaki Matsumoto +2 more | 2018-07-17 |
| 8435698 | Fuel container | Yugo Matsuda, Yasunari Kabasawa, Toshimi Kamitani | 2013-05-07 |
| 7951504 | Fuel cartridge | Toshimi Kamitani, Yasunari Kabasawa, Yugo Matsuda | 2011-05-31 |
| 7909901 | Liquid cartridge | Yasunari Kabasawa, Toshimi Kamitani | 2011-03-22 |
| 7381004 | Gas pressurized writing instrument and writing instrument refill | Kazuhiko Furukawa | 2008-06-03 |
| 7325992 | Gas-pressurized writing instrument and writing instrument refill | Kazuhiko Furukawa | 2008-02-05 |
| 7303351 | Writing instrument and welding method of writing point assembly and writing instrument parts connecting structure and connecting method | Kazuhiko Furukawa, Yoshihide Ishii, Daisen Kato | 2007-12-04 |
| 6926458 | Ball-point pen refill | Takayuki Maki | 2005-08-09 |
| 6881802 | Catalyst for addition polymerization and process for producing an addition polymer | Masaaki Nabika | 2005-04-19 |
| 6841650 | Crystallizable poly (2,5-di-substituted-1,4-phenylene oxide) and a method of preparing the same | Hideyuki Higashimura, Yoshihiko Moro-Oka, Shiro Kobayashi | 2005-01-11 |
| 6541596 | Crystallizable poly (2,5-di-substituted-1,4-phenylene oxide) and a method of preparing the same | Hideyuki Higashimura, Yoshihiko Moro-Oka, Shiro Kobayashi | 2003-04-01 |
| 6048054 | Ink replenishing apparatus and ink replenishing method for ink-jet printing ink cartridge | Yoichi Ando, Hajime Toda | 2000-04-11 |