Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6731481 | Relaying method for protecting transformers | Yong Cheol Kang, Sang-Hee Kang, Byung Eun Lee, Jae Sung Yun | 2004-05-04 |
| 6617839 | Method for detecting current transformer saturation | Yong Cheol Kang, Sang-Hee Kang | 2003-09-09 |