TREA

Walter A. Yarbrough

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  • State College, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Alumina sol-gel fiber
    • Patent number 5,514,631
    • Issue date May 7, 1996
    • Norton Company
    • Thomas E. Cottringer
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Abrasive material and method
    • Patent number 5,395,407
    • Issue date Mar 7, 1995
    • Norton Company
    • Thomas E. Cottringer
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Abrasive material and method
    • Patent number 5,383,945
    • Issue date Jan 24, 1995
    • Norton Company
    • Thomas E. Cottringer
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES