Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5184057 | Control method and device for AC motor | Keijiro Sakai, Tunehiro Endo, Yuzuru Kubota, Takashi Ikimi, Nobuyoshi Mutoh | 1993-02-02 |
| 4865148 | Vehicle height control apparatus responsive to power steering operation | Katsuji Marumoto, Kazuo Tahara, Hisatugu Ishikura, Hirohisa Yamamura, Toru Tatsuzaki +5 more | 1989-09-12 |
| 4779709 | Apparatus for controlling AC elevators | Nobuo Mitsui, Yoshio Sakai, Masao Nakazato, Shigeta Ueda, Seiya Shima +5 more | 1988-10-25 |
| 4549258 | Inverter device using gate turn-off thyristors | Yasuo Matsuda, Katsunori Suzuki, Yoshiki Kajita | 1985-10-22 |
| 4420718 | Control system for induction motor using inverter for AC power supply | Keijiro Sakai, Yasuo Matsuda | 1983-12-13 |
| 4276589 | Twelve-step current source inverter | Tadashi Okawa, Yasuo Matsuda, Takanori Shibata, Toshio Kawaguchi | 1981-06-30 |
| 4188663 | Protective device of a current source inverter | Tadashi Okawa, Yasuo Matsuda | 1980-02-12 |