Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5520137 | Twin-hull boat with hydrofoils | Toshihiko Arii, Kensaku Takenaka, Yoshitada Hiramatsu, Masayuki Segawa, Hiromasa Sugimura +3 more | 1996-05-28 |
| 5408948 | Twin-hull boat with hydrofoils and control system | Toshihiko Arii, Isamu Takenaka, Tadao Takai, Yuki NAKAGAWA, Yasuo Nakai | 1995-04-25 |