Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5750285 | Life indicator and lead-acid storage battery with life indicator | Tadamasa Akutagawa, Shigeru Sano | 1998-05-12 |
| 5458766 | Life indicator and cartridge for indicating total water flow | Katuo Ehara, Tadashi Okutoh, Shigeru Sano | 1995-10-17 |
| 5316876 | Lithium secondary battery | Kazuya Kuriyama | 1994-05-31 |