TREA

Yoshihiro Ishihara

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  • Kyoto, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Forging die and upset forging method
    • Patent number 6,250,128
    • Issue date Jun 26, 2001
    • Komatsu Industries Corporation
    • Hiroyuki Ando
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...