Issued Patents All Time
Showing 1–25 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12431812 | Active clamp flyback converter having clamp switch and clamp capacitor and control IC for controlling the clamp switch to limit resonance current | — | 2025-09-30 |
| 12372557 | Excitation current detection circuit and semiconductor device | Toshihiro Nakano, Mitsutomo Yoshinaga, Hiroshi Hosoya | 2025-07-29 |
| 12126267 | Resonant converter with a synchronous rectifier controller having ontime and offtime counting | Eunsuk Lee, Jungyul Kim, Masaaki Shimada, Mitsutomo Yoshinaga, Hanju Kang | 2024-10-22 |
| 12003180 | Power supply for driving synchronous rectification elements of SEPIC converter | Masaru Nakamura, Jianao Yao | 2024-06-04 |
| 11973431 | Switching power supply apparatus | Eunsuk Lee, Kyusam Choi, Jaekuk Yu, Mitsutomo Yoshinaga, Hanju Kang | 2024-04-30 |
| 10770761 | Fuel cell control device, control method thereof, and fuel cell vehicle | Takao Watanabe, Junichi Matsuo | 2020-09-08 |
| 10618421 | Fuel cell system | Yuji Kakeno | 2020-04-14 |
| 10615437 | Fuel cell system including converter boosting output voltage based on duty ratio | Yutaka Tano, Yuji Kakeno | 2020-04-07 |
| 10573909 | Fuel cell system | Takahiro UMEHARA | 2020-02-25 |
| 10486543 | Voltage control device for fuel-cell vehicle | Junichi Matsuo, Akihiro Kamiya, Tomoya Ogawa, Tatsuya Fukami, Takao Watanabe | 2019-11-26 |
| 10312538 | Fuel cell system for vehicle and control method thereof | Takao Watanabe, Akihiro Kamiya, Tomoya Ogawa, Junichi Matsuo | 2019-06-04 |
| 10227020 | Fuel cell system | Tatsuya Fukami, Takao Watanabe | 2019-03-12 |
| 10153504 | Fuel cell system | Yuji Kakeno, Yutaka Tano | 2018-12-11 |
| 8951685 | Fuel cell system | Shigeto Kajiwara, Naohisa Tsuchiya | 2015-02-10 |
| 8927164 | Fuel cell system with scavenging means and control unit thereof | — | 2015-01-06 |
| 8441201 | LED driving apparatus | — | 2013-05-14 |
| 8383281 | Fuel cell system | Shigeto Kajiwara | 2013-02-26 |
| 8320138 | DC converter | — | 2012-11-27 |
| 8221925 | Fuel cell system for impedance measurement and scavenging processing | Tomonori Imamura, Shigeto Kajiwara | 2012-07-17 |
| 8223520 | DC conversion apparatus | Yukihiro Kaminaga | 2012-07-17 |
| 8188617 | Current balancing apparatus, current balancing method, and power supply apparatus | Kengo Kimura | 2012-05-29 |
| 8173312 | Fuel cell system with electric storage device and voltage converter | — | 2012-05-08 |
| 8119298 | Fuel cell system and mobile body | Tomohiro Saito | 2012-02-21 |
| 7863838 | Power supply system provided with a plurality of power supplies, and vehicle provided with such power supply system | — | 2011-01-04 |
| 7589980 | DC-DC converter | — | 2009-09-15 |