About: http://webisa.webdatacommons.org/441300876

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	Numerous HFM's and their separation layers are described in the literature and particularly in the following patent specifications of fairly recent date.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com