Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8809688 | Polyamic acid solution, polyimide resin and flexible metal clad laminate using the same | Yang Seob Kim, Won Kyum Kim, Dong Bo Yang | 2014-08-19 |
| 8421436 | Step-down converter maintaining stable operation at start up | Hyeong-sik CHOI, Gil-yong Chang | 2013-04-16 |
| 6975523 | Power supply capable of protecting electric device circuit | Gil-yong Chang | 2005-12-13 |