Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11996578 | Vent plug for lead-acid battery and lead-acid battery | Tatsuya Morii, Yu Kojima | 2024-05-28 |
| 10211445 | Lead-acid battery | Mikihito Hasegawa, Yu Kojima | 2019-02-19 |
| 5199777 | Drawer apparatus | Hajime Taima | 1993-04-06 |