About: http://webisa.webdatacommons.org/273592749

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	y formed of extruded metal parts adapted for inter engagement one with the other and for direct structural mounting to oppositely disposed sections of vertical mullions adapted to support a panel, such as glass, placed therebetween.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com