About: http://webisa.webdatacommons.org/196908951

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	Apparatus according to claim 2 further including means for adjusting the ratio of duration of said alternative signal levels. 4.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com