Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5290148 | High head pump-turbines | Sachio Tsunoda, Hiroshi Tanaka, Shigeto Fujiki, Yoshikazu Kobayashi, Akira Terasaki | 1994-03-01 |
| 5249130 | Air-fuel ratio control apparatus for an alcohol engine | Kiyotaka Mamiya, Katuhiro Yokomizo, Takayoshi Hayashi | 1993-09-28 |
| 4640664 | Methods of controlling operation of multistage hydraulic machines | Shinsaku Sato | 1987-02-03 |
| 4538957 | Multi-stage hydraulic machine and control method for multi-stage hydraulic machine | Shinsaku Sato | 1985-09-03 |
| 4502835 | Multistage hydraulic machine | — | 1985-03-05 |
| 4502831 | Method of controlling operation of multistage hydraulic machines | Shinsaku Sato | 1985-03-05 |
| 4472103 | Multistage hydraulic machines and methods of controlling operations thereof | Sachio Tsunoda | 1984-09-18 |
| 4431370 | Multistage hydraulic machines having air exhausting devices | Kentaro Ichikawa, Sachio Tsunoda | 1984-02-14 |
| 4280788 | Multistage hydraulic machine system and a method for controlling the operation thereof | Sachio Tsunoda | 1981-07-28 |
| 4225294 | Oil seal means for rotary piston engines including a nitrided and ground surface | Seiichi Kakuwa, Toshihiko Hattori, Toshio Yamada | 1980-09-30 |