About: http://webisa.webdatacommons.org/125942929

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	A still further feature of the present invention is that it does not require mechanical devices other than ordinary shafts and gears to complete the stepped rotation of its rotor.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com