Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11214092 | Knocking-type writing instrument equipped with eraser | — | 2022-01-04 |
| 10974539 | Rotary feeding mechanism for rod-shaped body | Hiroyuki Kanari | 2021-04-13 |
| 9180722 | Mechanical pencil having lead-rotating mechanism | Akihiro Ohkouchi | 2015-11-10 |