Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5234177 | Magnetic braking apparatus and tension control system using the magnetic braking apparatus | Hajime Nakamura, Hikaru Okuno | 1993-08-10 |
| 5178582 | Electromagnetic powder coupling device | Hiroyoshi Yamaji, Hidehisa Tuji | 1993-01-12 |
| 4974706 | Torque limiter | Sukehachi Oi | 1990-12-04 |
| 4844220 | Torque limiter | Sukehachi Oi | 1989-07-04 |