TREA

DOUGLAS J. CHRISTIANSEN

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  • LINDON, UT, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Multi-instrument calibration standard
    • Patent number 9,568,308
    • Issue date Feb 14, 2017
    • Douglas J. Christiansen
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Winching apparatus
    • Patent number 8,602,394
    • Issue date Dec 10, 2013
    • Douglas J. Christiansen
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Pass/fail tape measure calibrator
    • Patent number 8,438,745
    • Issue date May 14, 2013
    • Douglas J. Christiansen
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Tape measure calibrator
    • Patent number 8,024,867
    • Issue date Sep 27, 2011
    • Douglas J. Christiansen
    • G01 - MEASURING TESTING

Patents Applicationslast 30 patents