Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874999 | Automatic control system | Kazuo Takahashi | 1989-10-17 |
| 4823018 | Control system for variable speed water-wheel generator apparatus | Akira Bando, Eiji Haraguchi, Hiroto Nakagawa | 1989-04-18 |
| 4816696 | Variable-speed pumped-storage power generating system | Akihiro Sakayori, Akira Brando, Yasuteru Oono, Shigeaki Hayashi, Isao Yokoyama +1 more | 1989-03-28 |