Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4720440 | Monoblock sealed lead-acid storage battery | Masaharu Tsubota, Teruhiro Hatanaka | 1988-01-19 |
| 4689571 | Specific gravity detecting device for lead-acid battery | Hidetsugu Nitta, Masaharu Tsubota | 1987-08-25 |
| 4629622 | Sealed lead-acid battery | Kenji Asai | 1986-12-16 |
| 4336314 | Pasted type lead-acid battery | Masaharu Tsubota, Katsuhiro Takahashi | 1982-06-22 |