Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10507685 | Mechanical pencil unit and writing utensil with the mechanical pencil unit | Shigeo Abe, Yuya UCHIYAMA | 2019-12-17 |
| 9573410 | Writing utensil | Yoshitoshi Aizawa, Shigeo Abe, Shouhei Moriyasu | 2017-02-21 |