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Sealing system for an unloader
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Patent number 5,525,047
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Issue date Jun 11, 1996
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Cooper Cameron Corporation
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James E. Sternenberg
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Lift-turn valve and actuator assembly
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Patent number 5,005,805
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Issue date Apr 9, 1991
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Daniel Industries, Inc.
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Gene A. Morris
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Annular resilient metal valve seat
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Patent number 4,241,895
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Issue date Dec 30, 1980
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FMC Corporation
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James E. Sternenberg
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...