Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11648796 | Mechanical pencil having lead breakage-prevention mechanism | — | 2023-05-16 |
| 10974539 | Rotary feeding mechanism for rod-shaped body | Tomohiro HOSOYA | 2021-04-13 |
| 7527445 | Writing instrument | Yousuke Ishii | 2009-05-05 |
| 7367735 | Hand-held instrument having variable contour grip | — | 2008-05-06 |
| 7237972 | Automatic mechanical pencil and method of assembly thereof | Yasuhiro Sanpei | 2007-07-03 |
| 7207738 | Writing instrument | Yasuhiro Sanpei | 2007-04-24 |
| 6866436 | Writing instrument | Yousuke Ishii | 2005-03-15 |
| 6234697 | Mechanical pencil | Takeshi Kurihara | 2001-05-22 |