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Patente citante Fecha de presentación Fecha de emisión Cesionario original Título
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US67896228 Jul 200214 Sep 2004EZ Tech LimitedApparatus for and a method of anchoring an expandable conduit
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US712814519 Ago 200231 Oct 2006Baker Hughes IncorporatedHigh expansion sealing device with leak path closures
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US800203023 Jun 200823 Ago 2011Weatherford/Lamb, Inc.Retrievable bridge plug