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Chie Koizumi

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  • Kobe, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method for the manufacture of diaphragm bellows
    • Patent number 4,364,252
    • Issue date Dec 21, 1982
    • Osaka Rasenkan Kogyo Kabushiki Kaisha
    • Chie Koizumi
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...