TREA

David M. Lutgring

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  • Indianapolis, IN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Water resistant acoustic port in ear-mouthed hearing device
    • Patent number 9,636,259
    • Issue date May 2, 2017
    • 3M Innovative Properties Company
    • Paul D. Henry
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Portable charging storage case
    • Patent number D738112
    • Issue date Sep 8, 2015
    • 3M Innovative Properties Company
    • David M. Lutgring
    • D03 - Travel goods and personal belongings
  • Information Patent Grant

    Switch system having a button travel limit feature
    • Patent number 8,404,990
    • Issue date Mar 26, 2013
    • 3M Innovative Properties Company
    • David M. Lutgring
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Ear bud shaft and taper
    • Patent number D632678
    • Issue date Feb 15, 2011
    • 3M Innovative Properties Company
    • James D. Brown
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Ear bud body shape
    • Patent number D632677
    • Issue date Feb 15, 2011
    • 3M Innovative Properties Company
    • James D. Brown
    • D14 - Recording, communication, or information retrieval equipment

Patents Applicationslast 30 patents