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David A. Keech

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  • Three Rivers, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Inverted bucket steam trap
    • Patent number 4,149,557
    • Issue date Apr 17, 1979
    • Armstrong Machine Works
    • David A. Keech
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...