| # | Country | Total Patents | |
|---|---|---|---|
| #1 | China | 6 | |
| #2 | WIPO (World Intellectual Property Organization) | 3 | |
| #3 | Australia | 1 | |
| #4 | Republic of Korea | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Basic communication technologies |
| # | Technology | |
|---|---|---|
| #1 | Stereophonic systems | |
| #2 | Loudspeakers and microphones | |
| #3 | Amplifiers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Yan Congyu | 12 |
| Publication | Filing date | Title |
|---|---|---|
| CN101014211A | 5.1 track earphone with USB interface | |
| CN1889790A | Vibrator for Hi-Fi bass earphone | |
| WO2006108335A1 | 7.1 channel surround sound earphone | |
| CN1897761A | 7.1 audio track loop earphone | |
| CN1822712A | Digital decoding 5.1 sound track circulating sound system earphone | |
| CN1645729A | DC inverter with USB socket | |
| CN1486120A | 5.1 channel digital circulating earphone |