Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7645311 | Cyclone unit and contaminants-collecting apparatus having the same | Jang-keun Oh, Dong-hun Yoo, Myoung-sun Choung | 2010-01-12 |
| 7597730 | Dust collection apparatus for vacuum cleaner | Dong-hun Yoo, Myoung-sun Choung | 2009-10-06 |
| 7409742 | Suction nozzle for a vacuum cleaner | Hwa-gyu Song, Hyun Ju Lee, Dong-houn Yang, Jung-Hyeon Kim, Jun-Young Lee | 2008-08-12 |