Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871049 | Coupling device of magnetic particle type | — | 1989-10-03 |
| 4856631 | Permanent magnet coupling torque limiter | Kiyohide Okamoto, Masaya Yamada | 1989-08-15 |
RO
Ryosuke Okita
Overall (1989): #16,508 of 140,708Top 15%
2
Patents 1989