DF

David M. Friesema

ER Etymotic Research: 2 patents #32 of 67Top 50%
📍 Elk Grove Village, IL: #173 of 434 inventorsTop 40%
🗺 Illinois: #34,584 of 84,256 inventorsTop 45%
Overall (All Time): #2,124,693 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7761091 Method and system of managing volume and functionality control between an audio player and wireless earphones William Franklin Dunn, Jr., Gail Gudmundsen 2010-07-20
7555134 Antenna for miniature wireless devices and improved wireless earphones supported entirely by the ear canal William Frank Dunn, Timothy Milam, Kelly Kodama, Mead C. Killion, Viorel Drambarean 2009-06-30