TREA

Robert F. Shaftner

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  • Bowling Green, KY, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Portable heater
    • Patent number D264374
    • Issue date May 11, 1982
    • Koehring Company
    • Eugene C. Briggs
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Portable space heater
    • Patent number 4,313,417
    • Issue date Feb 2, 1982
    • Koehring Company
    • Eugene C. Briggs
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Window heater
    • Patent number D255599
    • Issue date Jun 24, 1980
    • Koehring Company
    • Eugene C. Briggs
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Window heaters
    • Patent number 4,132,353
    • Issue date Jan 2, 1979
    • Koehring Company
    • Eugene C. Briggs
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Portable space heater
    • Patent number 4,089,642
    • Issue date May 16, 1978
    • Koehring Company
    • Eugene C. Briggs
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Portable heater
    • Patent number 4,081,238
    • Issue date Mar 28, 1978
    • Koehring Company
    • Eugene C. Briggs
    • F24 - HEATING RANGES VENTILATING