About: http://webisa.webdatacommons.org/404862525

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	FIG. 17 is a simplified three-dimensional pictorial representation of an optical implementation used in the electronic light pen system of the present invention;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com