Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11146876 | Kernel-type earphone having pressure balance structure | Nakgyu Choi, Sangkyum Kim | 2021-10-12 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11146876 | Kernel-type earphone having pressure balance structure | Nakgyu Choi, Sangkyum Kim | 2021-10-12 |