Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11310604 | Flat speaker driven by a single permanent magnet and one or more voice coils | Leeg Hyun Cho, Youngil Cho | 2022-04-19 |
| 11044562 | Multi-diaphragm speaker driven by multiple voice coil plates and a shared permanent magnet pair | Leeg Hyun Cho, Youngil Cho | 2021-06-22 |