About: http://webisa.webdatacommons.org/92158048

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	Referring again to the figures, and particularly to FIGS. 1-4, 10 and 11, the device of the present invention has been illustrated as provided with two extended tracks located in parallel opposition on outer surfaces of the wall.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com