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Horizontal edna miner
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Patent number 4,556,257
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Issue date Dec 3, 1985
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Coaltex, Inc.
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James C. Justice
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E21 - EARTH DRILLING MINING
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Maneuverable full face miner
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Patent number 4,239,289
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Issue date Dec 16, 1980
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Coaltex, Incorporated
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James C. Justice
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E21 - EARTH DRILLING MINING
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Scoop-belt miner
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Patent number 4,120,535
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Issue date Oct 17, 1978
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Coaltex, Inc.
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Frank A. Delli-Gatti
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E21 - EARTH DRILLING MINING
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