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William T. Sand

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  • Attleboro, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Cryopump synchronous motor load monitor
    • Patent number 5,900,822
    • Issue date May 4, 1999
    • Helix Technology Corporation
    • William T. Sand
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Cryopump synchronous motor load monitor
    • Patent number 5,651,667
    • Issue date Jul 29, 1997
    • Helix Technology Corporation
    • William T. Sand
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Linear drive motor with flexible coupling
    • Patent number 5,146,124
    • Issue date Sep 8, 1992
    • Helix Technology Corporation
    • Graham Higham
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...