TREA

Harold R. Diffenderfer

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  • Pottstown, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Annular shaft seal with cam portion on sealing lip
    • Patent number 4,669,737
    • Issue date Jun 2, 1987
    • Neapco, Inc.
    • Harold R. Diffenderfer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Method for drawing telescoping tubes for torque transmission
    • Patent number 4,622,840
    • Issue date Nov 18, 1986
    • Neapco, Inc.
    • Harold R. Diffenderfer
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Telescoping tubes for torque transmission
    • Patent number 4,622,022
    • Issue date Nov 11, 1986
    • Neapco, Inc.
    • Harold R. Diffenderfer
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Protective guard for articulated shafting
    • Patent number 4,568,313
    • Issue date Feb 4, 1986
    • Neapco, Inc.
    • Harold R. Diffenderfer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Universal joint pivot assembly
    • Patent number 4,154,065
    • Issue date May 15, 1979
    • Neapco, Inc.
    • Harold R. Diffenderfer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...