About: http://webisa.webdatacommons.org/441930458

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	Since that invention was made, various types of machines have been built by Technitrol, Inc., employing the invention.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com