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Downhole tool retainer and guide ring
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Patent number 9,695,647
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Issue date Jul 4, 2017
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Varel International Ind., L.P.
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Ross Bassinger
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Impact drilling tool
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Patent number 4,044,844
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Issue date Aug 30, 1977
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Bassinger Tool Enterprises, Ltd.
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Jesse W. Harris
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E21 - EARTH DRILLING MINING
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Mud actuated drilling tool
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Patent number 3,970,152
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Issue date Jul 20, 1976
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Bassinger Tool Enterprises, Ltd.
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Jesse W. Harris
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E21 - EARTH DRILLING MINING