Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10915241 | Communication device with ID input method which conforms to positional notation of numeral system | Chang Choi | 2021-02-09 |
| 10298292 | Direct current power line communication control device using H-bridge circuit | Changjoon Choi | 2019-05-21 |