Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12224671 | Power supply circuit with two power conversion circuits | — | 2025-02-11 |
| 9899835 | Uninterruptible power supply system | Ryuji Yamada, Satoru Fujita | 2018-02-20 |
| 9673625 | Uninterruptible power supply apparatus | Ryuji Yamada, Ryuji Shimizu, Hirokazu Kadoi, Koji Kawaguchi | 2017-06-06 |
| 9071166 | Power converter with surge voltage suppression | Ryuji Yamada | 2015-06-30 |
| 8902621 | Power supply device for use with selectable AC power supply voltage | Ryuji Yamada | 2014-12-02 |
| 8902550 | Direct-current switch | Hirofumi Matsuo, Hiroyuki Ota, Toru Hosen, Hironobu Shiroyama | 2014-12-02 |
| 8605460 | Method for starting up DC-DC converter | — | 2013-12-10 |
| 8467212 | Rectifier circuit | Satoru Fujita, Ryuji Yamada | 2013-06-18 |
| 8416050 | Inductor | — | 2013-04-09 |
| 8183966 | Entirely integrated EMI filter based on a flexible multi-layer strip material | Dehong Xu, Zhiwei Wen, Xiaofeng Wu, Yasuhiro Okuma | 2012-05-22 |
| 7999633 | EMI filter with an integrated structure of common-mode inductors and differential-mode capacitors realized by flexible printed circuit board | Dehong Xu, Xiao-Feng Wu, Yanjun Zhang, Yi-Lin Chen, Yasuhiro Okuma | 2011-08-16 |
| 7679213 | AC to DC converter circuit | — | 2010-03-16 |
| 7671713 | Integrated structure of passive elements in LLC resonance converter realized by flexible circuit boards | Dehong Xu, Yanjun Zhang, Yi-Lin Chen | 2010-03-02 |
| 7586763 | Electric power converter circuit | — | 2009-09-08 |
| 7204893 | Copper base alloy casting, and methods for producing casting and forging employing copper base alloy casting | — | 2007-04-17 |
| 7172665 | Cu-based alloy and method of manufacturing high strength and high thermal conductive forged article using the same | — | 2007-02-06 |
| 6679955 | Copper base alloy casting, and methods for producing casting and forging employing copper base alloy casting | — | 2004-01-20 |
| 6437998 | Rectifying circuit and control method therefor | Kazuo Kuroki | 2002-08-20 |
| 4767493 | Method for heat-treating metal | — | 1988-08-30 |