Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4450942 | Variable speed rotary torque transmission device | Hideyasu Takefuta | 1984-05-29 |
| 4273226 | Electromagnetic spring-wound clutch | Hideyasu Takefuta, Teruyoshi Shibauta | 1981-06-16 |