| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Republic of Korea | 7 | |
| #2 | WIPO (World Intellectual Property Organization) | 3 | |
| #3 | China | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones |
| # | Name | Total Patents |
|---|---|---|
| #1 | Yoo Ok Jeung | 4 |
| #2 | Yu Dong Ok | 4 |
| #3 | Okjeong Yoo | 3 |
| #4 | Yoo Ok Jeong | 3 |
| #5 | Yoo Ok-Jeong | 1 |
| #6 | Ahn Ki Hun | 1 |
| #7 | Dongok Yoo | 1 |
| #8 | Yoo Okjeong | 1 |
| #9 | Park Jong Il | 1 |
| Publication | Filing date | Title |
|---|---|---|
| KR20200097675A | High quality electro-magnetic speaker with improved air gap accuracy | |
| KR20200050858A | In-ear earphone | |
| KR102070519B1 | In-ear earphone | |
| KR101901137B1 | High-resolution speaker | |
| KR20180090489A | Module-compatible variable earphone | |
| KR20180084216A | High quality electro-magnetic speaker with improved air gap accuracy | |
| KR20180057045A | Hybrid speaker |