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Internal grinder
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Patent number 4,956,945
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Issue date Sep 18, 1990
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Seiko Seiki Kabushiki Kaisha
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Jinichiro Ooshima
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Machine tools
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Patent number 4,646,596
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Issue date Mar 3, 1987
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Walter C. Edwards
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3625625
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Patent number 3,625,625
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Issue date Dec 7, 1971
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3552236
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Patent number 3,552,236
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Issue date Jan 5, 1971
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR