TREA

Norman D. Coffenberry

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  • Washington Court House, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Expandable plug
    • Patent number 5,184,698
    • Issue date Feb 9, 1993
    • SDI Operating Partners, L.P.
    • Norman D. Coffenberry
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Freeze plug installation tool
    • Patent number 4,974,685
    • Issue date Dec 4, 1990
    • SDI Operating Partners, L.P.
    • Norman D. Coffenberry
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Freeze plug
    • Patent number 4,930,459
    • Issue date Jun 5, 1990
    • SDI Operating Partners, L.P.
    • Norman D. Coffenberry
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS