Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8957596 | Preheating control device, lamp driving device including the same, and preheating control method | Gye-Hyun Cho | 2015-02-17 |
| 7911210 | Diagnosis device, diagnosis method, and lamp ballast circuit using the same | Gye-Hyun Cho, Jin Ho Choi | 2011-03-22 |