About: http://webisa.webdatacommons.org/233896344

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 instrument of claim 1 wherein the first means includes means for rotating the first pattern at a substantially constant velocity and the reference signal is a periodic signal generated by a function generator.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com