About: http://webisa.webdatacommons.org/233803476

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	The display system of claim 2 in which said second means is a lens assembly including lens means having cylindrical surfaces with a cylindrical curvature in a selected plane substantially normal to said axial ray.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com