Issued Patents All Time
Showing 25 most recent of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12431824 | Semiconductor device, motor drive system, and control method thereof | Satoshi Narumi, Takeshi Ohtsuki | 2025-09-30 |
| 11942890 | Semiconductor device, motor drive system, and method of starting motor | Satoshi Narumi, Takeshi Ohtsuki | 2024-03-26 |
| 11444557 | Semiconductor device and motor driving system using the same | Seigi Ishiji | 2022-09-13 |
| 10784801 | Motor driving apparatus and motor system | Kichiya Itagaki | 2020-09-22 |
| 10581364 | Motor drive device and motor system | Kichiya Itagaki | 2020-03-03 |
| 10348220 | Three-phase motor controlling system for data storage device | Seigi Ishiji | 2019-07-09 |
| 10199963 | Motor driving device and motor system | Kichiya Itagaki | 2019-02-05 |
| 10084400 | Motor driving device and motor system | Kichiya Itagaki | 2018-09-25 |
| 10056107 | Control device, magnetic disk control system, and control method for controlling disk storage device | Kichiya Itagaki, Seigi Ishiji | 2018-08-21 |
| 9842992 | Transistor using piezoresistor as channel, and electronic circuit | Satoshi Sugahara, Yusuke Shuto, Hiroshi Funakubo, Shuichiro Yamamoto | 2017-12-12 |
| 9667142 | Power supply device with shared inductive elements under switch control | Hiroshi Kuroiwa, Osamu Yamashita, Masahiro Ishihara | 2017-05-30 |
| 9502060 | Semiconductor integrated circuit and operating method for the same | Hideho Koyama, Kichiya Itagaki | 2016-11-22 |
| 9503011 | Motor driving method, motor driving device, and hard disk device | Kichiya Itagaki, Seigi Ishiji | 2016-11-22 |
| 9496814 | Motor drive control device and operation method thereof | Yuki Matsuya | 2016-11-15 |
| 9184680 | Motor drive control device and operating method thereof | — | 2015-11-10 |
| 9178462 | Motor drive controller and method for operating the same | Kenji Yoshida, Osamu Yamashita | 2015-11-03 |
| 8963455 | Motor drive control device and operation method thereof | Yuki Matsuya | 2015-02-24 |
| 8872413 | Perovskite oxide film and ferroelectric film using the same, ferroelectric device, and method for manufacturing perovskite oxide film | Yukio Sakashita, Hiroshi Funakubo, Mutsuo Ishikawa, Hiro Einishi, Takahisa SHIRAISHI | 2014-10-28 |
| 8816626 | Motor drive control device and operating method thereof | — | 2014-08-26 |
| 8569983 | Motor driving apparatus and method for control of motor revolution | Yasuhiko Kokami | 2013-10-29 |
| 8362727 | Control device for synchronous motor | Yoshitaka Iwaji, Yasuhiko Kokami, Junnosuke Nakatsugawa | 2013-01-29 |
| 8258732 | Drive system of synchronous motor | Yoshitaka Iwaji, Yasuhiko Kokami | 2012-09-04 |
| 8232751 | Drive system of synchronous motor | Yoshitaka Iwaji, Yasuhiko Kokami | 2012-07-31 |
| 8089232 | Motor drive device and semiconductor integrated circuit device | Kichiya Itagaki | 2012-01-03 |
| 7915844 | Motor driving apparatus and method for control of motor revolution | Yasuhiko Kokami | 2011-03-29 |