Issued Patents All Time
Showing 26–49 of 49 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4499414 | AC Motor control method | Mitsuhiko Hirota | 1985-02-12 |
| 4450393 | Spindle orientation control apparatus | Yoshinori Kohzai, Naoto Ota | 1984-05-22 |
| 4434464 | Memory protection system for effecting alteration of protection information without intervention of control program | Hitoshi Suzuki, Shigekatsu Takahashi | 1984-02-28 |
| 4403181 | Control system for stopping spindle at predetermined rotational position | Yoshinori Kohzai, Naoto Ota | 1983-09-06 |
| 4403179 | Control system for stopping spindle at predetermined rotational position | Yoshinori Kohzai, Naoto Ota | 1983-09-06 |
| 4398138 | Spindle orientation control method and apparatus | Yoshinori Kohzai, Naoto Ota | 1983-08-09 |
| 4386305 | Drive control system for motors | Yoshinori Kohzai | 1983-05-31 |
| 4379987 | Spindle rotation control system | Yoshinori Kohzai | 1983-04-12 |
| 4374350 | Control system for stopping spindle at predetermined rotational position | Yoshinori Kohzai, Naoto Ota | 1983-02-15 |
| 4364005 | Brushless tachometer generator | Yoshinori Kohzai, Yoichi Amemiya, Noboru Iwamatsu | 1982-12-14 |
| 4362976 | Driving circuit for DC motor | Yutaka Koiwai, Mitsuhiko Hirota | 1982-12-07 |
| 4359676 | Control system for stopping spindle at predetermined rotational position | — | 1982-11-16 |
| 4353018 | Control system for synchronized operation of machine tool motors | Yoshinori Kohzai | 1982-10-05 |
| 4347470 | Spindle orientation control apparatus | Yoshinori Kohzai, Naoto Ota | 1982-08-31 |
| 4347471 | Machine tool drive motor control system | Yoshinori Kohzai, Naoto Ota | 1982-08-31 |
| 4345192 | Control system for stopping spindle at predetermined rotational position | Yoshinori Kohzai, Naoto Ota | 1982-08-17 |
| 4342950 | Spindle rotation control system | Yoshinori Kohzai, Naoto Ota | 1982-08-03 |
| 4330832 | Cutter feed rate control system | Yoshinori Kohzai, Shigeki Kawada | 1982-05-18 |
| 4300079 | DC Motor control system | Shigeki Kawada, Naoto Ohta, Yasuo Takahasi | 1981-11-10 |
| 4284932 | System for driving DC motor | Shigeki Kawada, Naoto Ohta | 1981-08-18 |
| 4284939 | Device for detecting opposite phase and open phase | Shigeki Kawada, Naoto Ohta, Yutaka Koiwai | 1981-08-18 |
| 4268781 | DC Motor drive system | Shigeki Kawada, Shigeaki Oyama, Mitsuhiko Hirota, Toyohiko Nishimori | 1981-05-19 |
| 4268782 | Control system for a DC motor | Shigeki Kawada, Mitsuhiko Hirota, Naoto Ohta | 1981-05-19 |
| 4207504 | Spindle control system | Shigeki Kawada, Mitsuhiko Hirota | 1980-06-10 |