Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11701971 | Three-phase AC motor drive device, rail vehicle equipped with same, and three-phase AC motor drive method | Takeshi Shinomiya, Kazutoshi Ogawa, Katsumi Ishikawa, Kuniaki Otsuka, Hiroyuki Shirata +4 more | 2023-07-18 |
| 10177621 | Rotating electric machine or wind power generation system | Daisuke KORI, Motonobu Iizuka, Tetsuo Fujigaki, Atsushi Fukunaga, Yasunori Otsuki +6 more | 2019-01-08 |
| 5475314 | Method for estimating natural frequency of distribution system | Tadashi Naito | 1995-12-12 |
| 5473255 | Apparatus for estimating natural frequency of distribution system | Tadashi Naito | 1995-12-05 |