Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D574429 | Retractable marking pen | Shun Kusaba | 2008-08-05 |
| D566177 | Ballpoint pen | Masanao Shiina | 2008-04-08 |
| D534586 | Ballpoint pen | — | 2007-01-02 |
| D533591 | Ballpoint pen | — | 2006-12-12 |
| D532454 | Ball pen | Matsuko Miyashita, Yujiro Nakata | 2006-11-21 |
| D527765 | Ballpoint pen | — | 2006-09-05 |
| D525302 | Ballpoint pen | — | 2006-07-18 |
| D498493 | Writing instrument | — | 2004-11-16 |