Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12355379 | Power conversion system | Koudai Okuzono, Keisuke Ohta, Masaki Kono, Masahide Fujiwara, Yuu Yoshikawa +1 more | 2025-07-08 |
| 12249906 | Air conditioner | Masaki Kono, Keisuke Ohta | 2025-03-11 |
| 12224678 | Power converter and heat pump system provided therewith | Masaki Kono, Masahide Fujiwara | 2025-02-11 |
| 12155212 | Power control system and device | Masaki Kouno, Keisuke Ohta, Hiroki Kojima | 2024-11-26 |
| 12095434 | Current distortion reduction apparatus | Ryou Matsuyama, Masaki Kouno | 2024-09-17 |
| 11788752 | Power source quality management system and air conditioning apparatus | Jun Takahashi, Masaki Kono | 2023-10-17 |
| 11750112 | Inverter device including a bootstrap circuit | Masahide Fujiwara, Nobuyasu Hiraoka, Keito KOTERA, Taku Itou, Masaki Kouno | 2023-09-05 |
| 11577186 | Active filter system and air conditioning device | Masaki Kono, Takayuki Fujita | 2023-02-14 |
| 11374487 | Power source quality management system and air conditioner | Masaki Kono, Takayuki Fujita | 2022-06-28 |
| 11201470 | Power-source power factor control system, phase modifying apparatus, and active filter apparatus | Masaki Kono, Takayuki Fujita | 2021-12-14 |
| 10903755 | Power conversion device | Yueqiang Zhou | 2021-01-26 |
| 10797584 | Active filter device, air conditioning device, and air conditioning system | Takayuki Fujita, Masaki Kouno | 2020-10-06 |
| 10651651 | Device with built-in active filter | Masaki Kono, Takayuki Fujita | 2020-05-12 |
| 10511220 | Control device for active filter | — | 2019-12-17 |
| 10447191 | Power conversion device | — | 2019-10-15 |
| 10110113 | Active filter and AC-DC conversion device | Takayuki Fujita | 2018-10-23 |
| 10048655 | Control device outputting a control input to a system based on an observable amount obtained from the system | — | 2018-08-14 |
| 9835364 | Active filter control device | — | 2017-12-05 |
| 9178412 | Bidirectional switch circuit configured to conduct current in reverse direction without applying an on-drive signal and power converter including the same | Kazushi Hisayama, Hiroshi Hibino, Morimitsu Sekimoto, Toshiyuki Maeda, Sumikazu Matsuno | 2015-11-03 |
| 8098035 | Motor control unit | Morimitsu Sekimoto, Hitoshi Haga, Abdallah Mechi, Kenichi Sakakibara, Toshiyuki Maeda | 2012-01-17 |
| 8030661 | Power conversion apparatus | Morimitsu Sekimoto, Hitoshi Haga, Kenichi Sakakibara, Abdallah Mechi, Toshiyuki Maeda | 2011-10-04 |
| 8008886 | Power converter | Yoshitsugu Koyama | 2011-08-30 |
| 7667941 | Power supply circuit protecting method and apparatus for the same | — | 2010-02-23 |
| 7187566 | Three-phase rectifier | Kenichi Sakakibara, Sumio Kagimura, Isao Tanatsugu | 2007-03-06 |
| 6137700 | Converter with a high power factor using a DC center point voltage | Masakazu Iida | 2000-10-24 |