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David A Fitzpatrick

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  • Forest Hil, MD, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Canal phones with structure and method for selectively passing or b...
    • Patent number 9,131,311
    • Issue date Sep 8, 2015
    • Polk Audio, LLC
    • Stuart W. Lumsden
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Speaker
    • Patent number D621385
    • Issue date Aug 10, 2010
    • DEI Headquarters, Inc.
    • Allen S. Baron
    • D14 - Recording, communication, or information retrieval equipment

Patents Applicationslast 30 patents