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John Duncan

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  • Reno, NV, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Gate valve having service position
    • Patent number 7,445,019
    • Issue date Nov 4, 2008
    • High Vacuum Apparatus Mfg., Inc.
    • Arthur J. Brenes
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    GATE VALVE HAVING SERVICE POSITION
    • Publication number 20080035876
    • Publication date Feb 14, 2008
    • HIGH VACUUM APPARTUS MFG., INC.
    • Arthur J. Brenes
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...