Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6029923 | Magnetic noncontacting tension device for winding yarn | Takashi Ishimaru, Yasuo Yokoyama | 2000-02-29 |
| 5952750 | Electromagnetic spring clutch with non-magnetic rotating members | Yasuo Yokoyama | 1999-09-14 |