TREA

Frank R. Volgstadt

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  • Madison, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Stab-type coupling with conduit inner diameter seal
    • Patent number 6,142,538
    • Issue date Nov 7, 2000
    • Perfection Corporation
    • Frank R. Volgstadt
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Valve and tapping tee apparatus and method
    • Patent number 4,809,735
    • Issue date Mar 7, 1989
    • Perfection Corporation
    • Frank R. Volgstadt
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Valve and tapping tee apparatus and method
    • Patent number 4,730,636
    • Issue date Mar 15, 1988
    • Perfection Corporation
    • Frank R. Volgstadt
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    No-hole insertion joint
    • Patent number 4,487,432
    • Issue date Dec 11, 1984
    • Perfection Corporation
    • David P. Passerell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Gas riser apparatus
    • Patent number 4,482,170
    • Issue date Nov 13, 1984
    • Perfection Corporation
    • Irvin D. Jacobson
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Angle cock valve
    • Patent number 4,418,888
    • Issue date Dec 6, 1983
    • Perfection Corporation
    • Irvin D. Jacobson
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Stab-type coupling and method
    • Patent number 4,282,175
    • Issue date Aug 4, 1981
    • Perfection Corporation
    • Frank R. Volgstadt
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Stab-type coupling
    • Patent number 4,229,025
    • Issue date Oct 21, 1980
    • Perfection Corporation
    • Frank R. Volgstadt
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Shutoff valve
    • Patent number 4,216,793
    • Issue date Aug 12, 1980
    • Perfection Corporation
    • Frank R. Volgstadt
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pipe fitting having a non-metallic sealing member
    • Patent number 4,083,583
    • Issue date Apr 11, 1978
    • Perfection Corporation
    • Frank R. Volgstadt
    • F24 - HEATING RANGES VENTILATING