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Microdrill bit
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Patent number 5,009,705
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Issue date Apr 23, 1991
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Mitsubishi Metal Corporation
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Hironori Yoshimura
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Surface-coated cutting member
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Patent number 4,781,989
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Issue date Nov 1, 1988
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Mitsubishi Kinzoku Kabushiki Kaisha
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Hironori Yoshimura
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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Rotary cutting tool of cemented carbide
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Patent number 4,642,003
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Issue date Feb 10, 1987
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Mitsubishi Kinzoku Kabushiki Kaisha
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Hironori Yoshimura
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Tungsten cermet
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Patent number 4,587,174
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Issue date May 6, 1986
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Mitsubishi Kinzoku Kabushiki Kaisha
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Hironori Yoshimura
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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