TREA

John Frederick Hayfield

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  • San Diego, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sealing assembly
    • Patent number 6,471,217
    • Issue date Oct 29, 2002
    • CryoGen, Inc.
    • John Frederick Hayfield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...