Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870339 | Variable-speed power generating system | Yosio Furukawa, Yasuhiro Yasaka, Osamu Nagura, Hiroto Nakagawa, Yasuteru Oono | 1989-09-26 |
| 4823018 | Control system for variable speed water-wheel generator apparatus | Takao Kuwabara, Akira Bando, Hiroto Nakagawa | 1989-04-18 |
| 4812729 | Protecting apparatus for secondary excitation type variable speed AC generator/motor | Akio Ito, Hidenori Sawa, Hiroshi Sugisaka, Shigeaki Hayashi, Hiroto Nakagawa +1 more | 1989-03-14 |
| 4766360 | Induction generator/motor system | Hiroto Nakagawa, Akira Bando, Yoji Tanaka, Kenichi Ono, Hiroshi Kashiwazaki +1 more | 1988-08-23 |
| 4754156 | Control apparatus for variable-speed hydraulic power generating system | Junichi Shiozaki, Akira Bando, Takao Kuwabara, Hiroto Nakagawa | 1988-06-28 |
| 4743826 | Pumping-up generator/motor system and method of operation of the same | Akira Bando, Kenichi Ono, Hiroshi Kashiwazaki, Hiroshi Sugisaka, Hiroto Nakagawa | 1988-05-10 |
| 4694189 | Control system for variable speed hydraulic turbine generator apparatus | Hiroto Nakagawa, Akira Bando, Takao Kuwahara, Haruo Nohara, Kenichi Ono | 1987-09-15 |