Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6611120 | Robot cleaning system using mobile communication network | Jang-youn Ko, Sang Yong Lee | 2003-08-26 |
| 6597143 | Mobile robot system using RF module | Sang Yong Lee | 2003-07-22 |
| 6546593 | Upright type vacuum cleaner having a cyclone type dust collector | Jang-keun Oh, Kyu-Chang Park | 2003-04-15 |
| 6521006 | Vacuum cleaner | Kyu-Chang Park, Jang-keun Oh | 2003-02-18 |