Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7350474 | Sailing device | — | 2008-04-01 |
| 5199367 | Catamaran | Keiji Nakagawa, Fumitaka Yokoyama | 1993-04-06 |
| 5078072 | Catamaran | Keiji Nakagawa, Fumitaka Yokoyama | 1992-01-07 |
| 4989533 | Support strut for hydrofoil craft | — | 1991-02-05 |
| 4972792 | Lateral stabilization device for entirely submerged type hydrofoil craft | Fumitaka Yokoyama | 1990-11-27 |
| 4872805 | Water powered device | Masato Suzuki | 1989-10-10 |
| 4737070 | Water powered device | Masato Suzuki | 1988-04-12 |
| 4411214 | Rowing scull | — | 1983-10-25 |