Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9533528 | Ballpoint pen | Yoshihisa Osano, Yoshihide Ishii, Misao Ooyama | 2017-01-03 |
| 9416286 | Ink composition for aqueous ballpoint pen | Yoji Takeuchi, Yusuke Kobayashi, Noriko SAKANE | 2016-08-16 |