Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6600273 | High-power electronic ballast for fluorescent lamp | Jong Sun Kim, Choong Sik Yoo | 2003-07-29 |
| 6509699 | Digital controlled electronic ballast with piezoelectric transformer | Jong Soo Kim, Sang Hyun Lee, Jong Sun Kim, Choong Sik Yoo | 2003-01-21 |