Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6640385 | Cyclone dust collecting apparatus for a vacuum cleaner | Jang-keun Oh | 2003-11-04 |
| 6611120 | Robot cleaning system using mobile communication network | Jeong-gon Song, Sang Yong Lee | 2003-08-26 |