Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10561914 | Baseball or softball bat with modified restitution characteristics | Michiharu Tsukamoto, Yohei Yamashita, Toshiaki Kida, Kohei Kikuchi | 2020-02-18 |
| 10195504 | Baseball or softball bat with modified restitution characteristics | Michiharu Tsukamoto, Yohei Yamashita, Toshiaki Kida | 2019-02-05 |
| 8814733 | Baseball or softball bat with modified restitution characteristics | Michiharu Tsukamoto, Yohei Yamashita, Toshiaki Kida | 2014-08-26 |
| 8602924 | Baseball or softball bat | Toshiaki Kida, Yutaka Yamaguchi | 2013-12-10 |