TREA

Hitoshi Okubo

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  • Kitakyushu, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Roll forming apparatus
    • Patent number 4,697,446
    • Issue date Oct 6, 1987
    • Nippon Steel Corporation
    • Yoshun Yamamoto
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...