TREA

Kenneth H. Frey

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  • Hyattsville, MD, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Variable output fluid pump/motor
    • Patent number 4,055,106
    • Issue date Oct 25, 1977
    • Byrne; Edward A.
    • Kenneth H. Frey
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES