About: http://webisa.webdatacommons.org/136670081

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	U.S. Pat. No. 5,610,770 discloses a magnification system which positions a lens in spaced relation to printed material such as a menu or a map.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es