Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10975810 | Positive crankcase ventilation system | — | 2021-04-13 |
| 10704460 | Recirculation valve for turbo charger engine | Dong Ho Chu, Jeong Il LEE | 2020-07-07 |
| 10087827 | Valve device for vehicle | Dong Ho Chu, Yang Geol Lee, Woo Young Choi | 2018-10-02 |
| 8738048 | Method of updating user presence information in mobile instant messaging and mobile terminal using the same | — | 2014-05-27 |