Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8855339 | Electret loudspeaker device | Chih-Kung Lee, Yu-Chi Chen, Han-Lung Chen, Wen-Hsin Hsiao | 2014-10-07 |
| 8699730 | Electret loudspeaker device | Chih-Kung Lee, Yu-Chi Chen, Han-Lung Chen, Wen-Hsin Hsiao | 2014-04-15 |