TREA

Weining Song

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  • Markham, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Annular co-extrusion die
    • Patent number 5,690,972
    • Issue date Nov 25, 1997
    • Macro Engineering & Technology Inc.
    • Mirek Planeta
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL