Issued Patents All Time
Showing 1–25 of 49 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11264892 | Power-supply apparatus and power-supply method | Hiroshi Nakao, Yu Yonezawa | 2022-03-01 |
| 11028492 | Electrolytic system, electrolytic control circuit, and control method for electrolytic system | Yu Yonezawa, Hiroshi Nakao, Daiji YAMASHITA | 2021-06-08 |
| 10797595 | Power supply and control method for power supply | Yu Yonezawa, Jun Oikawa, Eiji Nagashima | 2020-10-06 |
| 10627455 | Capacitor life diagnosis apparatus and capacitor life diagnosis method | Hiroshi Nakao, Yu Yonezawa, Takahiko Sugawara | 2020-04-21 |
| 10409301 | Electronic apparatus and surface temperature calculation method | Masatoshi Ishii, Hiroshi Nakao | 2019-09-10 |
| 10345360 | Capacitor life diagnosis device, capacitor life diagnosis method, and program | Hiroshi Nakao, Yu Yonezawa, Takahiko Sugawara | 2019-07-09 |
| 10254179 | Enclosure surface temperature estimation method and electronic apparatus | Masatoshi Ishii | 2019-04-09 |
| 10014770 | Power supply device, control circuit for power supply device, and control method for power supply device | Yu Yonezawa | 2018-07-03 |
| 10008940 | Power supply device and method for controlling power supply circuit | Takahiko Sugawara, Yu Yonezawa, Hiroshi Nakao | 2018-06-26 |
| 9960695 | Power supply apparatus and error detecting method for power supply apparatus | Yu Yonezawa, Takahiko Sugawara | 2018-05-01 |
| 9893629 | Control method for switching power supply circuit and power supply device | Yu Yonezawa, Tomotake Sasaki, Hisato HOSOYAMA | 2018-02-13 |
| 9887635 | Double-ended forward converter and power supply device | Yu Yonezawa | 2018-02-06 |
| 9837208 | Inductor apparatus and inductor apparatus manufacturing method | Hiroshi Nakao, Yu Yonezawa, Takahiko Sugawara, Yoshikatsu Ishizuki, Shinya Sasaki +1 more | 2017-12-05 |
| 9800145 | Control device, DC-DC converter, switching power supply apparatus, and information processing apparatus | Tomotake Sasaki, Yu Yonezawa, Junji Kaneko | 2017-10-24 |
| 9762232 | Semiconductor device | Yu Yonezawa | 2017-09-12 |
| 9590512 | Power supply apparatus | Yu Yonezawa, Tomotake Sasaki, Yoshinobu Matsui | 2017-03-07 |
| 9559593 | Synchronous rectification converter and control method of synchronous rectification converter | Yu Yonezawa | 2017-01-31 |
| 9553521 | Power supply device and control method of power supply device | Yu Yonezawa | 2017-01-24 |
| 9472333 | Planar type transformer and switching power supply circuit | Yu Yonezawa, Hiroshi Nakao | 2016-10-18 |
| 9461542 | Power supply apparatus | Kazunori Hayami, Yu Yonezawa | 2016-10-04 |
| 9444350 | DC-DC converter with LC resonance circuit and transformer | Yu Yonezawa | 2016-09-13 |
| 9438107 | Control device, control method, and power supply device | Tomotake Sasaki, Tsugito Maruyama, Yu Yonezawa | 2016-09-06 |
| 9318972 | Power circuit | Yu Yonezawa | 2016-04-19 |
| 9166480 | Insulation-type power factor correction circuit | Yu Yonezawa | 2015-10-20 |
| 9152472 | Load distribution system | Satoshi Kazama | 2015-10-06 |