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Yasukazu Nakada

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  • Kawaguchi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Photochromic composition
    • Patent number 5,266,447
    • Issue date Nov 30, 1993
    • Lintec Corporation
    • Kazuhiro Takahashi
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...