Issued Patents 2017
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9628899 | Piezoelectric ceramic speaker and dual-band earphone having thereof | Ying-Shih Huang | 2017-04-18 |
| 9613614 | Noise-reducing headphone | — | 2017-04-04 |
| 9615162 | Earphone with inverse sound waves | Ying-Shih Huang | 2017-04-04 |
| 9602913 | Dual-frequency coaxial headphone | — | 2017-03-21 |