Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9451349 | Earphone assembly with moisture resistance | Timothy K. Wickstrom, Ying-Tzu Chan, Mei-Yu Lin, Jen Nan Feng | 2016-09-20 |
| 9078064 | Earphone assembly with moisture resistance | Timothy K. Wickstrom, Ying-Tzu Chan, Mei-Yu Lin, Jen Nan Feng | 2015-07-07 |
| 8532323 | Earphone assembly with moisture resistance | Timothy K. Wickstrom, Mei-Yu Lin, Ying-Tzu Chan, Jen Nan Feng | 2013-09-10 |
| 7477756 | Isolating deep canal fitting earphone | Timothy K. Wickstrom, David Schaefer | 2009-01-13 |
| 5335286 | Electret assembly | Elmer V. Carlson | 1994-08-02 |