TREA

Howard T. DeGraffenried

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  • Henryetta, OK, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Stacked filter cartridge
    • Patent number 4,632,755
    • Issue date Dec 30, 1986
    • Howard T. DeGraffenried
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL