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Seiji Yoshida

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  • Kawasaki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Polycarbonate and optical disc substrate
    • Patent number 4,734,488
    • Issue date Mar 29, 1988
    • Mitsubishi Chemical Industries Ltd.
    • Masayoshi Hasuo
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Optical disc substrate made of a copolycarbonate
    • Patent number 4,680,374
    • Issue date Jul 14, 1987
    • Mitsubishi Chemical Industries Ltd.
    • Masayoshi Hasuo
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...