Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6761995 | Coin-shaped battery | Daisuke Yoshida, Toshihiko Izumikawa, Yasushi Hirakawa, Susumu Yamanaka | 2004-07-13 |
| 6696198 | Flat battery | Mitsugu Okahisa, Susumu Yamanaka, Toshihiko Ikehata, Tetsuya Takeuchi | 2004-02-24 |