Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7819601 | Pressurized pen | — | 2010-10-26 |
| 7604427 | Pressurized pen | — | 2009-10-20 |
| D593602 | Multicolored ballpoint pen | Kazunori Katami | 2009-06-02 |
| D590884 | Pen clip | Kazunori Katami | 2009-04-21 |