Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870339 | Variable-speed power generating system | Yasuhiro Yasaka, Osamu Nagura, Eiji Haraguchi, Hiroto Nakagawa, Yasuteru Oono | 1989-09-26 |
| 4812730 | Variable-speed generator/motor system | Hiroto Nakagawa, Yasuteru Oono, Tadaatsu Kato, Osamu Nagura, Sadahiko Niwa +1 more | 1989-03-14 |
| 4291926 | Guide bearing device | Shunzo Tomioka, Kinpei Okano, Masanori Matsuo | 1981-09-29 |
| 4246505 | Rotor with salient poles and shield plates between the poles | Yasuhiro Yasaka | 1981-01-20 |