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Drill bit and step feeding method
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Patent number 5,888,036
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Issue date Mar 30, 1999
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Hitachi Seiko, Ltd.
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Kunio Arai
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Low mass spindle and Z-axis unit
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Patent number 5,108,236
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Issue date Apr 28, 1992
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Hitachi, Seiko, Ltd.
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Kunio Arai
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Low mass spindle and Z-axis unit
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Patent number 5,078,558
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Issue date Jan 7, 1992
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Hitachi Seiko, Ltd.
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Kunio Arai
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Tool detecting apparatus
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Patent number 5,029,097
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Issue date Jul 2, 1991
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Hitachi Seiko Ltd.
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Norio Michigami
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G05 - CONTROLLING REGULATING
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Board exchanging apparatus
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Patent number 4,867,297
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Issue date Sep 19, 1989
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Hitachi Seiko, Ltd.
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Kunio Saitoh
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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