TREA

James A. Johnson

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  • Broomall, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus and method for sealing shafts
    • Patent number 6,234,414
    • Issue date May 22, 2001
    • Pennsylvania Crusher Corporation
    • Paul R. DeVitis
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...