Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11207913 | Erasing member and erasing tool using the same | Toshimi Kamitani, Yosuke Setagawa, Hitoshi Kino, Tooru Nakajima | 2021-12-28 |
| 11179962 | Pencil lead | Hiroyuki Arai | 2021-11-23 |