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Robert A. Frenzel

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  • Waller, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Multi-component metal seat design for ball valves
    • Patent number 8,424,841
    • Issue date Apr 23, 2013
    • Bray International, Inc.
    • Robert Anthony Frenzel
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Valve assembly
    • Patent number 5,427,354
    • Issue date Jun 27, 1995
    • Keystone International Holdings Corp.
    • Daniel P. Kusmer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Valve assembly having improved valve seat
    • Patent number 5,388,806
    • Issue date Feb 14, 1995
    • Keystone International Holdings Corp.
    • Daniel P. Kusmer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rotary actuator
    • Patent number 5,054,374
    • Issue date Oct 8, 1991
    • Keystone International Holdings Corp.
    • William B. Scobie
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Rotary actuator and seal assembly for use therein
    • Patent number 5,007,330
    • Issue date Apr 16, 1991
    • Keystone International Holdings Corp.
    • William B. Scobie
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL

Patents Applicationslast 30 patents