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Gate valve structure
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Patent number 4,486,003
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Issue date Dec 4, 1984
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Joy Manufacturing Company
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Danny S. Meyer
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Expanding gate valve
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Patent number 4,291,862
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Issue date Sep 29, 1981
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ACF Industries, Incorporated
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Patricio D. Alvarez
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Seat assembly for ball valves
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Patent number 4,290,581
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Issue date Sep 22, 1981
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ACF Industries, Incorporated
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George A. Moran
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Metallic seals for ball valve
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Patent number 4,147,327
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Issue date Apr 3, 1979
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ACF Industries, Incorporated
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George A. Moran
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Ball valve seat ring construction
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Patent number 4,071,041
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Issue date Jan 31, 1978
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ACF Industries, Incorporated
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George A. Moran
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...