Issued Patents 2019
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10192455 | User device, server, system and computer-readable recording medium for preparing and reproducing contents for digital lesson and control method thereof | Eun-kyung Yoo, Joon-hwan Kim, Chan Hee Jung | 2019-01-29 |