Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8648572 | Protection circuit and battery pack | Yoshikazu Kiyohara, Toshiyuki Nakatsuji | 2014-02-11 |
| 8183832 | Charging system, charger, and battery pack | Yoshikazu Kiyohara | 2012-05-22 |