Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6442124 | Compatible optical pick-up apparatus for recording and reproducing information from recording media having different formats | Chong-sam Chung, Yong-hoon Lee | 2002-08-27 |
| 5912533 | AC powder electroluminescence device and method for making the same | Ju Hyeon Lee, Sung Won Park, Vladimir Vlaskin, Sang Gook Park, Il Chae Jung | 1999-06-15 |