TREA

C. K. Krishnakumar

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  • Lombard, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Air conditioning and heat pump system
    • Patent number 4,981,023
    • Issue date Jan 1, 1991
    • Innovative Products, Inc.
    • C. K. Krishnakumar
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Water heater
    • Patent number 4,678,116
    • Issue date Jul 7, 1987
    • Chamberlain Manufacturing Corporation
    • C. K. Krishnakumar
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Ball valve purge device for tank cars
    • Patent number 4,586,547
    • Issue date May 6, 1986
    • General American Transportation Corporation
    • Stephen F. Fields
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...