Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6958894 | Relaying method for protecting a transformer using a difference of current | Yong Cheol Kang, Sang-Hee Kang, Byung Eun Lee | 2005-10-25 |
| 6731481 | Relaying method for protecting transformers | Yong Cheol Kang, Sang-Hee Kang, Byung Eun Lee, Seung-Hun Ok | 2004-05-04 |