<http://webisa.webdatacommons.org/prov/118899176>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/49613247> .
<http://webisa.webdatacommons.org/49613247>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/49613247>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/49613247>	<http://www.w3.org/ns/prov#value>	"A cover is also provided including a marginal cover flange and a cavity, the cavity being formed by a raised...http://www.google.es/patents/US4577757?utm_source=gb-gplus-sharePatente US4577757 - Grooved base package B???squeda avanzada de patentes N???mero de publicaci???nUS4577757 ATipo de publicaci???nConcesi???n N???mero de solicitudUS 06/642,470 Fecha de publicaci???n25 Mar 1986 Fecha de prese" .