Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5440220 | Battery discharge control circuit | Koji Umetsu, Masayoshi Sasaki | 1995-08-08 |
| 5408170 | Device for charging a secondary battery having interrupt means to prevent overcharging | Koji Umetsu, Masayoshi Sasaki | 1995-04-18 |