Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9365732 | Oily ink composition for ballpoint pens | Yoshitaka Morimoto, Yuichi Kobayashi, Natsumi Koide | 2016-06-14 |
| 8771410 | Ink for ballpoint pens and ballpoint pen using same | Ikuo Takagishi, Kiyonori Yasuike, Hiroki Kimura, Takashi Sekine | 2014-07-08 |