| 9164529 |
High voltage power supply and method of outputting plus/minus high-voltage in image forming apparatuses |
Jong-hwa Cho |
2015-10-20 |
| 9008531 |
Constant current-type high-voltage power supply apparatus and method of controlling power output from the same |
Jong-hwa Cho |
2015-04-14 |
| 8884466 |
High voltage power supply |
— |
2014-11-11 |
| 8634738 |
High voltage power supply and method of outputting plus/minus high-voltage in image forming apparatuses |
Jong-hwa Cho |
2014-01-21 |
| 8487475 |
Power supply apparatus and method of supplying power |
Jong-hwa Cho, Joong-gi Kwon, Jong-yang Choo |
2013-07-16 |
| 8350407 |
High voltage power supply apparatus |
Jong-hwa Cho, Joong-gi Kwon, Jong-yang Choo |
2013-01-08 |
| 8340539 |
Constant current-type high-voltage power supply apparatus and method of controlling power output from the same |
Jong-hwa Cho |
2012-12-25 |
| 8283807 |
High voltage power supply |
— |
2012-10-09 |
| 8283806 |
High voltage power supply |
— |
2012-10-09 |
| 8274176 |
Power supply apparatus |
Jong-hwa Cho, Joong-gi Kwon, Jong-yang Choo |
2012-09-25 |
| 8260167 |
High-voltage power supply |
Joong-gi Kwon |
2012-09-04 |
| 8213824 |
High voltage power controlling apparatus of image forming apparatus and method thereof |
Jong-hwa Cho |
2012-07-03 |
| 7986534 |
Apparatus to generate high voltage by digital control and method thereof |
Young-min Chae, Joong-gi Kwon, Jong-hwa Cho, Sang-yong Han |
2011-07-26 |
| 7932640 |
High voltage power supply |
— |
2011-04-26 |
| 7907864 |
High voltage power controlling apparatus of image forming apparatus including multiple DC power supplies |
Jong-hwa Cho |
2011-03-15 |
| 7821798 |
High voltage power supply |
Jong-hwa Cho |
2010-10-26 |
| 7706122 |
Analog control ASIC apparatus for high voltage power supply in image forming apparatus and method for controlling high voltage power supply |
Young-min Chae, Joong-gi Kwon, Jong-hwa Cho, Sang-yong Han |
2010-04-27 |
| 7508095 |
Apparatus to generate high voltage by digital control and method thereof |
Young-min Chae, Joong-gi Kwon, Jong-hwa Cho, Sang-yong Han |
2009-03-24 |
| 7474193 |
Toroidal line filter and method of winding coil of toroidal line filter |
Tae-kwon Na |
2009-01-06 |
| 7443704 |
AC high voltage detecting device |
Jong-hwa Cho |
2008-10-28 |
