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Power tongs
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Patent number 4,404,876
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Issue date Sep 20, 1983
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Eckel Manufacturing Co., Inc.
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Emery L. Eckel
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E21 - EARTH DRILLING MINING
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Back-up power tongs and method
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Patent number 4,290,304
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Issue date Sep 22, 1981
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Eckel Manufacturing Company, Inc.
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Emery L. Eckel
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E21 - EARTH DRILLING MINING
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Power tongs
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Patent number 4,089,240
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Issue date May 16, 1978
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Eckel Manufacturing Co., Inc.
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Emery Lee Eckel
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E21 - EARTH DRILLING MINING
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Power tongs
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Patent number 4,084,453
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Issue date Apr 18, 1978
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Eckel Manufacturing Co., Inc.
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Emery Lee Eckel
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E21 - EARTH DRILLING MINING
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