Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5104123 | Metal bat for use in baseball | Masatoyo Okitsu, Katsuji Kitagawa, Masao Kubo | 1992-04-14 |
| 4972790 | Boom for boardsailing | — | 1990-11-27 |
| 4867091 | Surfing boom | Masatoyo Okitsu, Toshio Mitsuyasu | 1989-09-19 |