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Shigeki Sawa

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  • Nagoya, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of plastic working of metal materials
    • Patent number 4,407,682
    • Issue date Oct 4, 1983
    • Daido Tokushuko Kabushiki Kaisha
    • Shigeki Sawa
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...