TREA

George W. Armstrong

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  • Fairborn, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Lock gate blade-type valve
    • Patent number 5,213,237
    • Issue date May 25, 1993
    • George W. Armstrong
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Direct powered gate valve
    • Patent number 5,139,048
    • Issue date Aug 18, 1992
    • George W. Armstrong
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL