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Shizuo Matsumaru

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Dense crown optical glass
    • Patent number 4,285,729
    • Issue date Aug 25, 1981
    • Nippon Kogaku K.K.
    • Shizuo Matsumaru
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Grant

    Optical glass
    • Patent number 4,144,076
    • Issue date Mar 13, 1979
    • Nippon Kogaku K.K.
    • Shizuo Matsumaru
    • G02 - OPTICS
  • Information Patent Grant

    Optical glass
    • Patent number 4,118,238
    • Issue date Oct 3, 1978
    • Nippon Kogaku K.K.
    • Kazufumi Ishibashi
    • C03 - GLASS MINERAL OR SLAG WOOL