About: http://webisa.webdatacommons.org/71531534

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	A still further object and advantage of the invention is the provision of a snap in vent which maintains its location without the need for nails, staples or other fasteners.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com