Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11140356 | Terminal and server for providing video call service | Sang Il Ahn | 2021-10-05 |
| 11032512 | Server and operating method thereof | Sang Il Ahn | 2021-06-08 |
| 10970523 | Terminal and server for providing video call service | Sang Il Ahn | 2021-04-06 |