Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7139375 | Highway expansion apparatus for key telephone system and operation method thereof | Won Young Lee | 2006-11-21 |
| 6658887 | Dispenser and refrigerator fitted with the same | Song Choi | 2003-12-09 |