Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7155774 | Locking device for extension pipe of vacuum cleaner | — | 2007-01-02 |
| 6886865 | Locking device for extension pipe of vacuum cleaner | — | 2005-05-03 |
| 6607575 | Grill assembly of a cyclone dust collecting apparatus for a vacuum cleaner | Jang-keun Oh | 2003-08-19 |
| 6599338 | Grill assembly of a cyclone dust collecting apparatus for a vacuum cleaner | Jang-keun Oh | 2003-07-29 |