Issued Patents All Time
Showing 1–25 of 49 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11649359 | Composition, coating method, and multilayer structure | Naoki Shiba, Hidetsugu Kawai, Shinya Okazaki | 2023-05-16 |
| 11467677 | Input pen and method of manufacturing input pen | Masashi Sakagami, Hisanori Yanagi | 2022-10-11 |
| 10576774 | Ballpoint pen | Takeo Fukumoto, Tooru Nakajima, Yusuke Kobayashi, Tomoyuki Akagi | 2020-03-03 |
| 10576775 | Knock type writing instrument | Yoshiharu Namiki, Yusuke Nakamura, Kazuhiko Takanashi, Atsushi Nakashima, Yoshihiro MANTA | 2020-03-03 |
| 10507684 | Writing instrument | Tooru Nakajima, Yusuke Kobayashi, Kensuke INOUE | 2019-12-17 |
| 10336129 | Writing implement | Tooru Nakajima, Takeo Fukumoto | 2019-07-02 |
| 9889701 | Writing implement | Takeo Fukumoto, Tooru Nakajima | 2018-02-13 |
| 9545813 | Ball pen | Takeo Fukumoto, Seiichi Maruyama | 2017-01-17 |
| 9162515 | Writing implement refill and writing implement | Seiichi Maruyama, Takeo Fukumoto | 2015-10-20 |
| 8162554 | Writing implement | Masanobu Kiritake, Kengo Nagaoka | 2012-04-24 |
| 7862249 | Ball-point pen tip and ink refill | Mitsuhiro Ohashi, Atsushi Nakajima, Hiroyuki Muto | 2011-01-04 |
| 7381004 | Gas pressurized writing instrument and writing instrument refill | Kiyoshi Fujisawa | 2008-06-03 |
| 7325992 | Gas-pressurized writing instrument and writing instrument refill | Kiyoshi Fujisawa | 2008-02-05 |
| 7303351 | Writing instrument and welding method of writing point assembly and writing instrument parts connecting structure and connecting method | Kiyoshi Fujisawa, Yoshihide Ishii, Daisen Kato | 2007-12-04 |
| 7223037 | Production processes for writing instrument and ink occlusion body | Yojiro Sano | 2007-05-29 |
| 7056052 | Ink reservoir for writing instrument | Shuji Ichikawa, Takeshi Kobayashi | 2006-06-06 |
| 6974272 | Writing instrument cap | Yojiro Sano | 2005-12-13 |
| 6966718 | Writing instrument, writing instrument cap and method of assembly of a writing instrument cap | Yojiro Sano | 2005-11-22 |
| 6873813 | Development method and image formation apparatus | Tadashi Iwamatsu, Hiroyuki Hirakawa, Tetsuro Toyoshima | 2005-03-29 |
| 6769827 | Collector type writing implement | Yojiro Sano | 2004-08-03 |
| 6681091 | Development method and image formation apparatus | Tadashi Iwamatsu, Hiroyuki Hirakawa, Tetsuro Toyoshima | 2004-01-20 |
| 6622000 | Developing apparatus having a charge amount control member | Hiroyuki Hirakawa, Shigeru Nishio | 2003-09-16 |
| 6619870 | Collector type writing implement | Yojiro Sano | 2003-09-16 |
| 6619871 | Collector type writing instrument | Yojiro Sano | 2003-09-16 |
| 6602012 | Collector type writing instrument | Yojiro Sano | 2003-08-05 |