Patents by Inventor David M. Friesema

David M. Friesema has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and system of managing volume and functionality control between an audio player and wireless earphones
    Patent number: 7761091
    Abstract: A method and system for providing low-noise, high-fidelity wireless Bluetooth earphones with control operation either at the earphone or the player that operate to control the volume and other functionality from either location in a seamless manner and provide probe volume control display regardless of which location is used.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: July 20, 2010
    Assignee: Etymotic Research, Inc.
    Inventors: William Franklin Dunn, Jr., David M. Friesema, Gail I. Gudmundsen
  • Method and System of Managing Volume and Functionality Control Between an Audio Player and Wireless Earphones
    Publication number: 20080058037
    Abstract: A method and system for providing low-noise, high-fidelity wireless Bluetooth earphones with control operation either at the earphone or the player that operate to control the volume and other functionality from either location in a seamless manner and provide probe volume control display regardless of which location is used.
    Type: Application
    Filed: September 5, 2007
    Publication date: March 6, 2008
    Applicant: ETYMOTIC RESEARCH, INC.
    Inventors: William Franklin Dunn, David M. Friesema, Gail I. Gudmundsen