TREA

John Polkinghorne

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  • Burlington, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Air damper assembly for refrigerator/freezer
    • Patent number 4,879,878
    • Issue date Nov 14, 1989
    • TRW Canada, Ltd.
    • John Polkinghorne
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Appliance control system
    • Patent number 4,843,833
    • Issue date Jul 4, 1989
    • TRW Canada Limited
    • John Polkinghorne
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Application specific integrated circuit
    • Patent number 4,816,823
    • Issue date Mar 28, 1989
    • TRW Canada, Ltd.
    • John Polkinghorne
    • G06 - COMPUTING CALCULATING COUNTING