Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4327315 | Induction motor drive apparatus | Hiroshi Ishida, Yutaka Koiwai | 1982-04-27 |
| 4322671 | Induction motor drive apparatus | Hiroshi Ishida, Yutaka Koiwai | 1982-03-30 |
| 4319177 | Operation control apparatus for AC motors | Hiroshi Ishida | 1982-03-09 |
| 4314191 | Protective system for inverter circuit used in driving AC motors | Hiroshi Ishida | 1982-02-02 |
| 4300079 | DC Motor control system | Yoshiki Fujioka, Naoto Ohta, Yasuo Takahasi | 1981-11-10 |
| 4291265 | Protective system for inverter circuit used in driving AC motors | Hiroshi Ishida, Keiji Sakamoto | 1981-09-22 |
| 4284932 | System for driving DC motor | Yoshiki Fujioka, Naoto Ohta | 1981-08-18 |
| 4284939 | Device for detecting opposite phase and open phase | Yoshiki Fujioka, Naoto Ohta, Yutaka Koiwai | 1981-08-18 |
| 4275342 | Abnormality detecting system for DC motor control apparatus | Katsuo Kobari, Hiroshi Ishida | 1981-06-23 |
| 4268781 | DC Motor drive system | Shigeaki Oyama, Yoshiki Fujioka, Mitsuhiko Hirota, Toyohiko Nishimori | 1981-05-19 |
| 4268782 | Control system for a DC motor | Yoshiki Fujioka, Mitsuhiko Hirota, Naoto Ohta | 1981-05-19 |
| 4207504 | Spindle control system | Yoshiki Fujioka, Mitsuhiko Hirota | 1980-06-10 |
| 4181875 | Drive circuit for a DC motor | Yoshinori Kohzai, Shigeaki Oyama | 1980-01-01 |