TREA

John D. Matthews

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  • Simi Valley, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mine clearing apparatus
    • Patent number 4,938,114
    • Issue date Jul 3, 1990
    • The United States of America as represented by the Secretary of the Navy
    • John D. Matthews
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Advanced heat pump
    • Patent number 4,930,322
    • Issue date Jun 5, 1990
    • The United States of America as represented by the Secretary of the Navy
    • Joseph L. Ashley
    • F24 - HEATING RANGES VENTILATING