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Ryurou Kurahashi

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  • Muroran, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rolling bearing
    • Patent number 5,011,304
    • Issue date Apr 30, 1991
    • Nippon Seiko Kabushiki Kaisha
    • Yasuo Murakami
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...