Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8934638 | Noise canceling headphone | — | 2015-01-13 |
| 8774421 | Noise canceling headphone and noise canceling earmuff | — | 2014-07-08 |
| 8582796 | Earmuff and headphone | — | 2013-11-12 |
| 8442258 | Headphone | — | 2013-05-14 |
| 8325963 | Bone-conduction microphone built-in headset | — | 2012-12-04 |
| 8045726 | Noise-cancelling headphone | — | 2011-10-25 |