David Michael Friesema

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Elk Grove Village, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and system of managing volume and functionality control betw...
- Patent number 7,761,091
- Issue date Jul 20, 2010
- Etymotic Research, Inc.
- William Franklin Dunn, Jr.
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Antenna for miniature wireless devices and improved wireless earpho...
- Patent number 7,555,134
- Issue date Jun 30, 2009
- Etymotic Research, Inc.
- William Frank Dunn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Method and System of Managing Volume and Functionality Control Betw...
- Publication number 20080058037
- Publication date Mar 6, 2008
- Etymotic Research, Inc.
- William Franklin Dunn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Antenna For Miniature Wireless Devices And Improved Wireless Earpho...
- Publication number 20080056526
- Publication date Mar 6, 2008
- Etymotic Research, Inc.
- William Frank Dunn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE