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Mine roof bolt anchor
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Patent number 6,146,055
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Issue date Nov 14, 2000
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Claude White
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E21 - EARTH DRILLING MINING
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Mine roof bolt anchor
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Patent number 5,885,031
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Issue date Mar 23, 1999
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Claude White
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E21 - EARTH DRILLING MINING
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Mine roof truss
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Patent number 4,749,310
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Issue date Jun 7, 1988
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Birmingham Bolt Company, Inc.
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Claude C. White
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E21 - EARTH DRILLING MINING
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Mine roof anchor assembly
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Patent number 4,437,795
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Issue date Mar 20, 1984
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Birmingham Bolt Company
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Claude C. White
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E21 - EARTH DRILLING MINING
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Mine roof bolt assembly
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Patent number 4,347,020
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Issue date Aug 31, 1982
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Birmingham Bolt Company
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Claude C. White
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E21 - EARTH DRILLING MINING
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Mine roof support plate
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Patent number 4,249,835
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Issue date Feb 10, 1981
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Claude C. White
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E21 - EARTH DRILLING MINING