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Yoshifumi Hirota

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Patents Grantslast 30 patents

  • Information Patent Grant

    Polypropylene molding material
    • Patent number 6,228,951
    • Issue date May 8, 2001
    • Japan Polychem Corporation
    • Yoshifumi Hirota
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...