Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5132177 | Alkaline storage cell | Katsuya Kawano, Shinsuke Nakahori | 1992-07-21 |
| 4619873 | Preservation device for lead storage battery | Akira Watanabe, Takanao Matsumoto | 1986-10-28 |
| 4473623 | Lead acid battery and method of storing it | Akira Watanabe | 1984-09-25 |