Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10136211 | Method of customizing speaker for hearing protection earcup | — | 2018-11-20 |
| 9786261 | Active noise reduction earcup with speaker array | — | 2017-10-10 |
| 9636260 | Custom microphones circuit, or listening circuit | — | 2017-05-02 |
| 8663513 | Foam earplug extrusion | — | 2014-03-04 |
| 8343397 | Method of forming an in-ear device | Edwin Woo | 2013-01-01 |
| 7967015 | High resilience flanged earplug | — | 2011-06-28 |
| 7712469 | Detectable earplug and cord | — | 2010-05-11 |
| 7220372 | Dual density earplug | Ed Woo | 2007-05-22 |
| 7192544 | Earplug with molded-in stiffener | Jim Tiemens | 2007-03-20 |
| 6981504 | Core stiffened earplug | — | 2006-01-03 |
| 6820717 | Pressure regulating earplug | Thomas W. Fleming, Bill Nyugen | 2004-11-23 |