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William J. Ballad

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  • Buffalo Grove, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Earphone assembly with moisture resistance
    • Patent number 9,451,349
    • Issue date Sep 20, 2016
    • Knowles Electronics, LLC
    • Timothy K. Wickstrom
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Earphone assembly with moisture resistance
    • Patent number 9,078,064
    • Issue date Jul 7, 2015
    • Knowles Electronics, LLC
    • Timothy K. Wickstrom
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Earphone assembly with moisture resistance
    • Patent number 8,532,323
    • Issue date Sep 10, 2013
    • Knowles Electronics, LLC
    • Timothy K. Wickstrom
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Isolating deep canal fitting earphone
    • Patent number 7,477,756
    • Issue date Jan 13, 2009
    • Knowles Electronics, LLC
    • Timothy K. Wickstrom
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Electret assembly
    • Patent number 5,335,286
    • Issue date Aug 2, 1994
    • Knowles Electronics, Inc.
    • Elmer V. Carlson
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents