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Durable blast joint
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Patent number 4,911,479
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Issue date Mar 27, 1990
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Jack R. Claycomb
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E21 - EARTH DRILLING MINING
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Blast joint
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Patent number 4,889,185
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Issue date Dec 26, 1989
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Robert J. Uherek
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E21 - EARTH DRILLING MINING
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Blast joint
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Patent number 4,685,518
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Issue date Aug 11, 1987
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Rickert Precision Industries, Inc.
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Jack R. Claycomb
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E21 - EARTH DRILLING MINING
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Drilling orientation tool
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Patent number 4,454,598
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Issue date Jun 12, 1984
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Dresser Industries, Inc.
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Jack R. Claycomb
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E21 - EARTH DRILLING MINING
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Measuring while drilling tool
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Patent number 4,235,021
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Issue date Nov 25, 1980
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Dresser Industries, Inc.
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Jack R. Claycomb
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E21 - EARTH DRILLING MINING
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