Issued Patents 2020
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10569596 | Writing tool refill and writing tool using same | Takayuki Ikai, Seiichi Takigawa, Naohiro Katou | 2020-02-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10569596 | Writing tool refill and writing tool using same | Takayuki Ikai, Seiichi Takigawa, Naohiro Katou | 2020-02-25 |