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William P. Greenleaf

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  • Girard, PA, US
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Patents Applicationslast 30 patents

  • Information Patent Application

    RAIL RE-PROFILING METHOD AND APPARATUS
    • Publication number 20160130768
    • Publication date May 12, 2016
    • Greenleaf Technology Corporation
    • Donald R. Hughes
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    RAIL RE-PROFILING METHOD AND APPARATUS
    • Publication number 20140271012
    • Publication date Sep 18, 2014
    • Donald R. Hughes
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR