Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6170303 | Washing machine equipped with an air bubble generator having contraction/enlargement exhaust nozzles | Dae Yeong Hong | 2001-01-09 |
| 6094948 | Washing machine with an air bubble generator | Dae Yeong Hong | 2000-08-01 |
| 5293664 | Low noise and less vibration vacuum cleaner | Chang Woo Son, Sang Kang | 1994-03-15 |