Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12202990 | Aqueous ink composition for ballpoint pen | Kousuke OGURA, Takashi Hamazaki | 2025-01-21 |
| 12110401 | Aqueous ink composition for writing instrument | Kousuke OGURA, Kana Miyoshi | 2024-10-08 |
| 11987068 | Marking pen | Yusuke Kobayashi, Toru Nakajima, Koji Takada | 2024-05-21 |
| 11634601 | Aqueous ink composition for ballpoint pen | Kousuke OGURA, Kana Miyoshi | 2023-04-25 |
| 10851252 | Aqueous ink composition for writing instruments | Kana Miyoshi, Kousuke OGURA | 2020-12-01 |