TREA

Ronald J. Gramm

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  • Pittsburgh, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Glazing material
    • Patent number 4,498,455
    • Issue date Feb 12, 1985
    • Ronald J. Gramm
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Solar heating and insulating apparatus
    • Patent number 4,058,109
    • Issue date Nov 15, 1977
    • Sunwall Incorporated
    • Ronald J. Gramm
    • F24 - HEATING RANGES VENTILATING