TREA

Takehiro Koga

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  • Osaka-Hu, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Piercing method and apparatus
    • Patent number 5,603,882
    • Issue date Feb 18, 1997
    • TDF Corporation
    • Yoshio Takano
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...