TREA

William H. Hapgood

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  • Concord, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Coiled heat exchanger
    • Patent number 4,588,026
    • Issue date May 13, 1986
    • Raytheon Company
    • William H. Hapgood
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    Self-pumping water boiler system
    • Patent number 4,158,438
    • Issue date Jun 19, 1979
    • Raytheon Company
    • William H. Hapgood
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Self-pumping water boiler system
    • Patent number 4,158,386
    • Issue date Jun 19, 1979
    • Raytheon Company
    • William H. Hapgood
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Self-pumping water boiler system
    • Patent number 4,149,673
    • Issue date Apr 17, 1979
    • Raytheon Company
    • William H. Hapgood
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Solar heating system
    • Patent number 4,122,830
    • Issue date Oct 31, 1978
    • Raytheon Company
    • William H. Hapgood
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Solar collector thermostat
    • Patent number 4,063,545
    • Issue date Dec 20, 1977
    • Raytheon Company
    • William H. Hapgood
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Burner control system
    • Patent number 3,975,137
    • Issue date Aug 17, 1976
    • Raytheon Company
    • William H. Hapgood
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
  • Information Patent Grant

    Multiport high density burner
    • Patent number 3,936,003
    • Issue date Feb 3, 1976
    • Raytheon Company
    • William H. Hapgood
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES