Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11194194 | Optical device | Jung Woon Kim, Su Young Ryu, Doo Young Huh, Byoung Kun Jeon, Sang-Uk Ryu | 2021-12-07 |
| 11078929 | Hydraulic striking device | Young Ky Kang, Jae Sang Cho | 2021-08-03 |
| 10904714 | Mobile terminal and control method | Tae Young Lee | 2021-01-26 |