Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6679930 | Device for reducing pressure loss of cyclone dust collector | Hyeok Seong An, Kyeong Seok Lim, Dong-Jin Kwak, Seong Hwa Lee | 2004-01-20 |
| 6572668 | Cyclone dust collector in vacuum cleaner | Hyeok Seong An, Kyeong Seok Lim, Dong-Jin Kwak, In Cheol Yun | 2003-06-03 |