Issued Patents All Time
Showing 1–25 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8848384 | Power transducer | Yasushi Sasaki, Yutaka Maeno, Masayuki Hirota, Kazuyuki Fukushima | 2014-09-30 |
| 8531140 | Power transducer | Yoshihiro Uchino, Hiroshi Watanabe, Masahiro Hiraga | 2013-09-10 |
| 8423317 | Temperature detection method of semiconductor device and power conversion apparatus | Tomoya Kamezawa, Naoki Takata, Masayuki Hirota, Masahiro Hiraga | 2013-04-16 |
| 8385078 | Power transducer | Yasushi Sasaki, Yutaka Maeno, Masayuki Hirota, Kazuyuki Fukushima | 2013-02-26 |
| 8378599 | Power transducer | Yoshihiro Uchino, Hiroshi Watanabe, Masahiro Hiraga | 2013-02-19 |
| 8159820 | Electric power conversion system | Koji Hamano, Jiangming Mao, Tomoya Kamezawa, Masayuki Hirota, Masahiro Hiraga | 2012-04-17 |
| 8120294 | Power transducer | Yoshihiro Uchino, Hiroshi Watanabe, Masahiro Hiraga | 2012-02-21 |
| 7904254 | Power conversion apparatus and method of estimating power cycle life | Tomoya Kamezawa, Jiangming Mao, Masayuki Hirota, Masahiro Hiraga | 2011-03-08 |
| 7745952 | Electric circuit module with improved heat dissipation characteristics using a fixing tool for fixing an electric apparatus to a heat sink | Kinya Nakatsu, Hideki Miyazaki | 2010-06-29 |
| 7643304 | Filter apparatus and frequency converter to which the filter apparatus is connected | Masayuki Hirota, Naoki Takata, Masahiro Hiraga | 2010-01-05 |
| 7518890 | AC/DC/AC converter with reduced inductance in the DC filter capacitors | Masayuki Hirota, Tomoya Kamezawa, Jiangming Mao | 2009-04-14 |
| 7515422 | Electric power converter | Masayuki Hirota, Tomoya Kamezawa, Jiangming Mao, Masahiro Hiraga | 2009-04-07 |
| 7394668 | Switching power supply circuit and frequency converter | Tooru Nakajima, Masahiro Hiraga, Tetsuya Kimura, Masayuki Hirota | 2008-07-01 |
| 7272004 | Frequency converter | Masayuki Hirota, Mingxi Huang, Yutaka Maeno | 2007-09-18 |
| 7206204 | Electric circuit module | Kinya Nakatsu, Naoki Takata, Masayuki Hirota, Tomoya Kamezawa | 2007-04-17 |
| 7151680 | Switching power supply circuit and frequency converter | Tooru Nakajima, Masahiro Hiraga, Tetsuya Kimura, Masayuki Hirota | 2006-12-19 |
| 7054157 | Frequency converter | Masayuki Hirota, Mingxi Huang, Yutaka Maeno | 2006-05-30 |
| 6960980 | Power converter with shunt resistor | Kinya Nakatsu, Masataka Sasaki, Ryuichi Saito, Masato Takase | 2005-11-01 |
| 6927665 | Power converter | Kinya Nakatsu, Masayuki Hirota, Tooru Nakajima | 2005-08-09 |
| 6873240 | Power converter | Kinya Nakatsu, Masayuki Hirota, Tooru Nakajima | 2005-03-29 |
| 6794854 | Vehicle power converted with shunt resistor having plate-shape resistive member | Kinya Nakatsu, Masataka Sasaki, Ryuichi Saito, Masato Takase | 2004-09-21 |
| 5465202 | Inverter apparatus provided with electric discharge control circuit of dc smoothing capacitor and method of controlling the same | Hitoshi Yamashita, Shigeyuki Baba, Hiroshi Fujii, Takatsugu Kambara, Akira Ishibashi | 1995-11-07 |
| 5210479 | Drive circuit for an insulated gate transistor having overcurrent detecting and adjusting circuits | Shin Kimura, Norikazu Tokunaga, Nobuyoshi Mutoh, Shuuji Musha, Yasuo Matsuda +1 more | 1993-05-11 |
| 5177678 | Inverter apparatus for preventing an overincrease of output frequency | Noritoshi Tuzi, Yasumasa Toudou, Hiroshi Fujii, Takatsugu Kambara | 1993-01-05 |
| 5175483 | Method and an apparatus for computing moment of inertia in a motor speed controller, and a speed control method and apparatus for a motor | Hiroshi Fujii, Atsuhiko Nakamura, Takatsugu Kambara | 1992-12-29 |