About: http://webisa.webdatacommons.org/292697115

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	Field of the Invention This invention relates to couplings and in particular to couplings for use with tubular ducts. 2.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com