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Drill
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Patent number 11,229,959
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Issue date Jan 25, 2022
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Sumitomo Electric Hardmetal Corp.
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Shuhei Misumi
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Drill bit
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Patent number D894978
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Issue date Sep 1, 2020
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Sumitomo Electric Hardmetal Corp.
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Shuhei Misumi
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D15 - Machines not elsewhere specified
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Drill
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Patent number 9,308,589
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Issue date Apr 12, 2016
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Sumitomo Electric Industries, Ltd
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Hisao Oka
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Drill
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Patent number D693861
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Issue date Nov 19, 2013
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Sumitomo Electric Hardmetal Corp.
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Yoshiji Sato
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D15 - Machines not elsewhere specified
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Twist drill
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Patent number 8,545,141
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Issue date Oct 1, 2013
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Sumitomo Electric Hardmetal Corp.
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Masaki Jindai
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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