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Controlled direct drive engine system
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Patent number 6,470,683
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Issue date Oct 29, 2002
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Science Applications International Corporation
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Willard D. Childs
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Integrated pumping and/or energy recovery system
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Patent number 6,017,200
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Issue date Jan 25, 2000
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Science Applications International Corporation
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Willard D. Childs
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Speed control valve
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Patent number 4,724,866
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Issue date Feb 16, 1988
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NL Industries, Inc.
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Howard J. Bates
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Crown block compensator
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Patent number 4,688,764
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Issue date Aug 25, 1987
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NL Industries, Inc.
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Douglas W. J. Nayler
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B66 - HOISTING LIFTING HAULING
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