TREA

Douglas F. Aitken

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  • Bedford, NH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Low profile in line cryogenic water pump
    • Patent number 5,887,438
    • Issue date Mar 30, 1999
    • Helix Technology Corporation
    • Joseph P. Johnson
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Cryogenic waterpump
    • Patent number 5,261,244
    • Issue date Nov 16, 1993
    • Helix Technology Corporation
    • Philip A. Lessard
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Cryopump with differential pumping capability
    • Patent number 5,211,022
    • Issue date May 18, 1993
    • Helix Technology Corporation
    • Allen J. Bartlett
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...