Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5733156 | Variable propeller for boat | Takao Aihara, Hideaki Takada | 1998-03-31 |
| 5593280 | Propeller for boat | Hideaki Takada, Takao Aihara | 1997-01-14 |
| 5562413 | Variable propeller for boat | Takao Aihara, Taro Fukuda, Hideaki Takada | 1996-10-08 |
| 5494406 | Propeller for boat | Hideaki Takada, Takao Aihara, Ryuichi Kimata | 1996-02-27 |