TREA

Antonio Maldarella Jr.

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  • Jefferson County, CO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sealing ring for spigot and socket pipe joint
    • Patent number 4,315,630
    • Issue date Feb 16, 1982
    • Johns-Manville Corporation
    • David W. French
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL