Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11752796 | Tail plug and writing instrument | Ichiro Nishitani | 2023-09-12 |
| 11724534 | Pen | Miyoko Tsuda | 2023-08-15 |
| 11472220 | Pen and pen refill | Ichiro Nishitani | 2022-10-18 |
| D837882 | Brush pen | Hiroko Tomiyama, Asuka Takahama | 2019-01-08 |
| D744592 | Marking pen | — | 2015-12-01 |
| D742454 | Marking pen | — | 2015-11-03 |
| D711471 | Marking pen | — | 2014-08-19 |