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Metal-to-metal ribbed seal
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Patent number 4,390,186
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Issue date Jun 28, 1983
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Combustion Engineering, Inc.
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John K. McGee
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E21 - EARTH DRILLING MINING
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Backseating and stop for valve operator
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Patent number 4,307,745
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Issue date Dec 29, 1981
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Combustion Engineering, Inc.
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John K. McGee
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Control line exiting coupling
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Patent number 4,181,175
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Issue date Jan 1, 1980
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Combustion Engineering, Inc.
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John K. McGee
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E21 - EARTH DRILLING MINING
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Selective back seat valve
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Patent number 4,149,558
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Issue date Apr 17, 1979
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Combustion Engineering, Inc.
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John K. McGee
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Hydraulic control assembly
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Patent number 4,147,325
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Issue date Apr 3, 1979
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Combustion Engineering, Inc.
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John K. McGee
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Drive nut and torque plate assembly
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Patent number 4,138,091
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Issue date Feb 6, 1979
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Combustion Engineering, Inc.
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John K. McGee
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Control line tubing hanger
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Patent number 4,090,565
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Issue date May 23, 1978
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Gray Tool Company
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John K. McGee
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E21 - EARTH DRILLING MINING
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