Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6578230 | Upright-type vacuum cleaner having a cyclone dust collecting apparatus | Jang-keun Oh | 2003-06-17 |
| 6546593 | Upright type vacuum cleaner having a cyclone type dust collector | Jang-keun Oh, Jeong-gon Song | 2003-04-15 |
| 6521006 | Vacuum cleaner | Jang-keun Oh, Jeong-gon Song | 2003-02-18 |
| 6502278 | Upright type vacuum cleaner having a cyclone type dust collector | Jang-keun Oh | 2003-01-07 |