TREA

Hisayasu Hasegawa

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  • Aichi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of making valve sleeves
    • Patent number 4,689,864
    • Issue date Sep 1, 1987
    • Toyota Jidosha Kabushiki Kaisha
    • Nobuo Fukuma
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...