Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7505380 | Apparatus and method for preventing writing error from occurring on optical disc | Seung-Beom Lee | 2009-03-17 |
| 5131509 | Dual brake apparatus | Jong-Do Kwak, Jong Keun Lee, Won Ki Ahn | 1992-07-21 |