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Ram-type blowout preventer
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Patent number 4,541,606
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Issue date Sep 17, 1985
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Cameron Iron Works, Inc.
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Leonard E. Williams
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E21 - EARTH DRILLING MINING
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Blowout preventer
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Patent number 4,227,543
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Issue date Oct 14, 1980
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Cameron Iron Works, Inc.
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Leonard E. Williams
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E21 - EARTH DRILLING MINING
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Valve
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Patent number 4,214,600
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Issue date Jul 29, 1980
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Cameron Iron Works, Inc.
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Leonard E. Williams
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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