Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5836047 | Vacuum cleaner for both upright and canister modes | Byung-Cheol Choi, Seon Kyu Kim, Yeong-je Jeon, Seon Young Hong, Nam-Ho Lee | 1998-11-17 |
| 5797661 | Wheel of a vacuum cleaner | Seon Kyu Kim, Suk-Gu Kim | 1998-08-25 |
| 5596236 | Motor capable of using high or low voltage | Byung-Cheol Choi, Nam-Ho Lee, Seon Kyu Kim | 1997-01-21 |