About: http://webisa.webdatacommons.org/32772245

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 combination as set forth in claim 1 wherein said rearwardly extending member is a cylindrical member, said spiral grooves extend to a depth to be aligned with the outer surface of said rearwardly extending cylindrical member.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com