About: http://webisa.webdatacommons.org/7570265

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This invention relates to closures and sealing means therefor such as used in tanks, containment vessels, ships and building structures.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com