Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8276815 | High-speed automatic fire net-based fire instruction control system for short-range anti-aircraft gun | — | 2012-10-02 |
| 7381236 | Cyclone dust-separating apparatus | Hyun Ju Lee, Hwa-gyu Song | 2008-06-03 |
| 7291189 | Dust collecting apparatus for vacuum cleaner | Keon-soo Choi | 2007-11-06 |
| 7137846 | Power cord | Keon-soo Choi | 2006-11-21 |
| 6977003 | Cyclone dust-collecting apparatus of vacuum cleaner | Keon-soo Choi | 2005-12-20 |