Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691620 | Battery charging method | Tamiji Nagai | 1997-11-25 |
| 5637981 | Method for charging a secondary battery and charger used therefor using constant current and constant voltage | Tamimi Nagai | 1997-06-10 |