Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4583733 | Baseball bat swing measuring device | Sho ITO, Kumio Kasahara, Toshio Takei, Tsutomu Hashimoto, Shojiro Nakahara | 1986-04-22 |
| 4577863 | Swing measuring device | Sho ITO, Kenji Tatsumi, Kumio Kasahara, Toshio Takei, Shojiro Nakahara | 1986-03-25 |