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Patent applications and USPTO patent grants for Choi; Sung-Kyou.The latest application filed is for "on-board regenerative electric power storage system for dc electric rail car".
Patent | Date |
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Regenerative power storage system mounted on DC electric railway car Grant 8,710,702 - Kim , et al. April 29, 2 | 2014-04-29 |
On-board Regenerative Electric Power Storage System For Dc Electric Rail Car App 20120013181 - Kim; Gil-Dong ;   et al. | 2012-01-19 |
Electrical inertial load controlling apparatus having gate drive for protecting IGBT Grant 7,042,691 - Kim , et al. May 9, 2 | 2006-05-09 |
Electrical inertial load controlling apparatus having gate drive for proctecting igbt App 20040136131 - Kim, Gil Dong ;   et al. | 2004-07-15 |
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