Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1107003 | Loudspeaker | Choong-rae Cho, Donghyub Kim, Young Tak Do, Ji-Hong Lim | 2025-12-23 |
| D1096699 | Loudspeaker | Choong-rae Cho, Young Tak Do, Donghyub Kim, Ji-Hong Lim | 2025-10-07 |
| D898120 | Traffic sign | — | 2020-10-06 |
| D898121 | Traffic sign | — | 2020-10-06 |
| D885487 | Traffic sign | — | 2020-05-26 |
| D884537 | Warning sign for roads | — | 2020-05-19 |