About: http://webisa.webdatacommons.org/228249243

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	In some alternate embodiments, additional helical, ramped or other shaped surfaces like the shaped wall 135 can be provided at other locations as well to further enhance the helical motion of the air within the air cleaner 100.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com