About: http://webisa.webdatacommons.org/171994190

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 present invention is an indispensable technique in a pictorial color copying machine or printer which requires high-precision reproducibility of multiple gray scale levels.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com