Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11145847 | Lead-acid battery | Yu Kojima | 2021-10-12 |
| 10714739 | Lead storage battery | Kenji Izumi, Yu Kojima, Shinsuke Ooki | 2020-07-14 |
| 10211445 | Lead-acid battery | Shinsuke Oki, Yu Kojima | 2019-02-19 |