About: http://webisa.webdatacommons.org/415800676

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 closing member 15, such as a zipper or other types of fastener, is provided at a joint of the upper cover 11 and the lower cover 12 to normally hold the two covers 11, 12 to a tightly closed position.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com