TREA

Duncan C. Engh

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  • Hagger City, WI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Retractable lifeline safety device
    • Patent number 5,186,289
    • Issue date Feb 16, 1993
    • D B Industries, Inc.
    • James T. Wolner
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...