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David E. Johnston

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  • East Hebron, NH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Radial shaft seal
    • Patent number 6,729,624
    • Issue date May 4, 2004
    • Freudenberg-NOK General Partnership
    • David E. Johnston
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Reverse seal
    • Patent number 6,428,013
    • Issue date Aug 6, 2002
    • Freudenberg-NOK General Partnership
    • David E. Johnston
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rotary shaft seal
    • Patent number 6,409,177
    • Issue date Jun 25, 2002
    • Freudenberg-NOK General Partnership
    • David E. Johnston
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Load bearing washer and dirt excluder
    • Patent number 6,073,933
    • Issue date Jun 13, 2000
    • Freudenberg-NOK General Partnership
    • David E. Johnston
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Uni-directional seal for use on a shaft
    • Patent number 5,921,555
    • Issue date Jul 13, 1999
    • Freudenberg-NOK General Partnership
    • David E. Johnston
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Seal design with bi-directional pumping
    • Patent number 5,791,658
    • Issue date Aug 11, 1998
    • Freudenberg-NOK General Partnership
    • David E. Johnston
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    Shaft seal having a hinge and a liner
    • Publication number 20060125192
    • Publication date Jun 15, 2006
    • Freudenberg-NOK General Partnership
    • David Ernest Johnston
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Shaft seal having a hinge and a liner
    • Publication number 20020158421
    • Publication date Oct 31, 2002
    • David Ernest Johnston
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...