Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12179510 | Friction body unit and thermochromic writing instrument | — | 2024-12-31 |
| 12097723 | Retractable writing implement | — | 2024-09-24 |
| 11912058 | Retractable writing instrument | — | 2024-02-27 |
| 11667146 | Writing tool | Tatsuya Iijima, Hisashi Iwata | 2023-06-06 |
| 11396203 | Knock type writing tool | — | 2022-07-26 |