TREA

Douglas A. Simpson

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  • Cambridge, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Damper and valve
    • Patent number 6,427,812
    • Issue date Aug 6, 2002
    • Active Control eXperts, Inc.
    • Edward F. Crawley
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Damper and valve
    • Patent number 6,193,029
    • Issue date Feb 27, 2001
    • Active Control eXperts, Inc.
    • Edward F. Crawley
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    Damper and valve
    • Publication number 20010025752
    • Publication date Oct 4, 2001
    • Edward F. Crawley
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...