Issued Patents All Time
Showing 1–25 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12355377 | Adjustable speed generator motor system with full power converter | Takahiko Kikui, Kenta Watanabe, Yasuhiro Kiyofuji, Masakazu Ishikawa, Tomomichi Ito +3 more | 2025-07-08 |
| 12289063 | Modular multilevel power converter and variable speed generator-motor | Takahiko Kikui, Kenta Watanabe, Tomomichi Ito, Yasuhiro Kiyofuji, Masakazu Ishikawa +1 more | 2025-04-29 |
| 12237789 | Modular multilevel converter and modular multilevel converter system | Takahiko Kikui, Francesco Chilosi, Silvio Resteghini | 2025-02-25 |
| 11942873 | Secondary magnetic excitation generator-motor device | Hironari Kawazoe, Akira Kikuchi | 2024-03-26 |
| 11223310 | Variable speed generator/motor device | Takashi OYAKE, Masaya Ichinose | 2022-01-11 |
| 11107892 | SiC epitaxial wafer and method for producing same | Keisuke Fukada, Naoto ISHIBASHI, Masahiko Ito, Isaho Kamata, Hidekazu Tsuchida +7 more | 2021-08-31 |
| 10784808 | Variable speed generator-motor apparatus and variable speed generator-motor system | Osamu Nagura | 2020-09-22 |
| 10536104 | Variable speed generator-motor apparatus and variable speed generator-motor system | Osamu Nagura | 2020-01-14 |
| 9573489 | Control device for railway power conditioner and control system for railway power conditioner | Yasuhiro Nakatsuka, Yasuhiro Imazu, Osamu Sakuchi, Masaya Ichinose, Yasuhiro Kiyofuji +6 more | 2017-02-21 |
| 9219426 | Switching element, power converter, direct current transmission system, current control device, method of controlling power converter, and method of controlling current in voltage source converter | Takayoshi Yamamoto, Masaya Ichinose, Keiichi Yamashita, Shigenori Inoue, Toru Yoshihara +4 more | 2015-12-22 |
| 9208037 | Duplexed operation processor control system, and duplexed operation processor control method | Toshiki Shimizu, Yusaku Otsuka, Yasuhiro Kiyofuji, Eiji Kobayashi, Akihiro Onozuka +10 more | 2015-12-08 |
| 9166492 | Multilevel voltage source converter and method for balancing capacitors | Takayoshi Yamamoto, Masaya Ichinose, Shigenori Inoue, Toru Yoshihara | 2015-10-20 |
| 8896261 | Doubly-fed generator and doubly-fed electric machine | Masaya Ichinose, Yasuhiro Kiyofuji, Yasuaki Nakayama | 2014-11-25 |
| 8882910 | AlGaN substrate and production method thereof | Hiroshi Amano | 2014-11-11 |
| 8867247 | DC/AC power converter with DC side double frequency pulsation suppression caused by AC side faults | Yasuhiro Kiyofuji, Masaya Ichinose, Hiromitsu Sakai, Yasuhiro Imazu | 2014-10-21 |
| 8541292 | Group III nitride semiconductor epitaxial substrate and method for manufacturing the same | Hiroshi Amano | 2013-09-24 |
| 8423681 | Control apparatus for process input-output device | Yusaku Otsuka, Naoya Mashiko, Shin Kokura, Yu Iwasaki, Ryuichi Murakawa +3 more | 2013-04-16 |
| 8209594 | Sending device, receiving device, communication control device, communication system, and communication control method | Akihiro Onozuka, Masakazu Ishikawa, Masamitsu Kobayashi, Takashi Umehara, Shin Kokura +7 more | 2012-06-26 |
| 8161362 | Task management control apparatus and method, having redundant processing comparison | Shin Kokura, Takashi Umehara, Masamitsu Kobayashi, Hisao Nagayama, Naoya Mashiko +6 more | 2012-04-17 |
| 8095695 | Control apparatus for process input-output device | Yusaku Otsuka, Naoya Mashiko, Shin Kokura, Yu Iwasaki, Ryuichi Murakawa +3 more | 2012-01-10 |
| 7555627 | Input-output control apparatus, input-output control method, process control apparatus and process control method | Naoya Mashiko, Takashi Umehara, Masamitsu Kobayashi, Hiromichi Endoh, Akihiro Onozuka +5 more | 2009-06-30 |
| 7485874 | Apparatus for manufacturing semiconductor substrates | Seiichi Nakamura, Hideki Nishihata, Riyuusuke Kasamatsu, Kazunori Tsubuku, Nobuo Tsumaki +4 more | 2009-02-03 |
| 7158521 | Synchronization system and synchronization method of multisystem control apparatus | Yuichiro Morita, Kotaro Shimamura, Yoshitaka Takahashi, Takashi Hotta, Kazuhiro Imaie +3 more | 2007-01-02 |
| 6389041 | Synchronization system and synchronization method of multisystem control apparatus | Yuichiro Morita, Kotaro Shimamura, Yoshitaka Takahashi, Takashi Hotta, Kazuhiro Imaie +3 more | 2002-05-14 |
| 6038683 | Replicated controller and fault recovery method thereof | Kotaro Shimamura, Yuuichiro Morita, Yoshitaka Takahashi, Takashi Hotta, Hiroyasu Satou +3 more | 2000-03-14 |