TREA

David Crafoord

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  • Bromma, SE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Welding helmet visor
    • Patent number D539988
    • Issue date Apr 3, 2007
    • 3M Innovative Properties Company
    • David Crafoord
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Ear portion of a welding helmet
    • Patent number D533313
    • Issue date Dec 5, 2006
    • 3M Innovative Properties Company
    • Kjell I. Mases
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Top portion of a welding helmet
    • Patent number D532939
    • Issue date Nov 28, 2006
    • 3M Innovative Properties Company
    • Oskar E. Juhlin
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Side portion of a welding helmet
    • Patent number D532560
    • Issue date Nov 21, 2006
    • 3M Innovative Properties Company
    • Lennart C. Fredriksson
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Side portion of a welding helmet
    • Patent number D526097
    • Issue date Aug 1, 2006
    • 3M Innovative Properties Company
    • Niklas Lilenthal
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Welding helmet lens frame
    • Patent number D525395
    • Issue date Jul 18, 2006
    • 3M Innovative Properties Company
    • Jonas D. Fridholm
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Pair of welding helmet visor flanges
    • Patent number D524992
    • Issue date Jul 11, 2006
    • 3M Innovative Properties Company
    • Rutger Belin
    • D29 - Equipment for safety, protection, and rescue