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John H. Francis

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  • Charles Town, WV, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Variable speed drive--apparatus and method of fabricating the appar...
    • Patent number 4,682,517
    • Issue date Jul 28, 1987
    • Frederick Manufacturing Company, Inc.
    • John H. Francis
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Conical drive
    • Patent number 4,644,810
    • Issue date Feb 24, 1987
    • Frederick Manufacturing Company
    • Roy E. Vanderlinden
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Speed reducing and torque transmitting mechanism
    • Patent number 4,599,910
    • Issue date Jul 15, 1986
    • Frederick Manufacturing Company
    • John H. Francis
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Multi-speed drive
    • Patent number 4,515,028
    • Issue date May 7, 1985
    • Frederick Manufacturing Company
    • Roy E. VanDerLinden
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...