Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11964509 | Writing tool | — | 2024-04-23 |
| 11472221 | Writing implement | Tooru Nakajima, Gouya Oono | 2022-10-18 |
| 10576774 | Ballpoint pen | Tooru Nakajima, Kazuhiko Furukawa, Yusuke Kobayashi, Tomoyuki Akagi | 2020-03-03 |
| 10336129 | Writing implement | Tooru Nakajima, Kazuhiko Furukawa | 2019-07-02 |
| 9981499 | Ballpoint pen | — | 2018-05-29 |
| 9889701 | Writing implement | Tooru Nakajima, Kazuhiko Furukawa | 2018-02-13 |
| 9545813 | Ball pen | Seiichi Maruyama, Kazuhiko Furukawa | 2017-01-17 |
| 9302530 | Cap for writing instrument and writing instrument | Syuuhei Hoshino | 2016-04-05 |
| 9162515 | Writing implement refill and writing implement | Seiichi Maruyama, Kazuhiko Furukawa | 2015-10-20 |
| 8936408 | Liquid material feeding container | Satoru Sumiyoshi, Mitsuru Endou | 2015-01-20 |
| 8845221 | Clicking type dispensing container | — | 2014-09-30 |
| 8337107 | Mechanical pencil | Norio Ohsawa, Yoshitoshi Osano, Takeshi Kobayashi, Hirotake Izawa, Kyo Nakayama | 2012-12-25 |
| 8328446 | Mechanical pencil | Hirotake Izawa, Norio Ohsawa, Kyo Nakayama, Yoshitoshi Osano | 2012-12-11 |
| 8043686 | Method of moulding composite member, and composite member | Hitoshi Suzuki, Kyo Nakayama, Hajime Sumitomo, Norio Ohsawa | 2011-10-25 |
| 7815385 | Mechanical pencil | Hirotake Izawa, Norio Ohsawa, Kyo Nakayama, Yoshitoshi Osano | 2010-10-19 |
| 7654763 | Mechanical pencil | Hirotake Izawa, Norio Ohsawa, Kyo Nakayama, Yoshitoshi Osano | 2010-02-02 |
| 7452148 | Lead holding structure of mechanical pencil | Kyo Nakayama, Hitoshi Suzuki | 2008-11-18 |
| 6854909 | Lead propelling device | Kyo Nakayama | 2005-02-15 |