About: http://webisa.webdatacommons.org/367988530

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	When the square 20 is in the open position, such as illustrated in FIG. 1, second and third legs 24 and 26 form a substantially 90 degree angle at an attachable and latchable joint 47.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com