About: http://webisa.webdatacommons.org/237211786

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	FIG. 2a is a pictorial diagram of the preferred embodiment of the improved helical filter in accordance with the present invention.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com