About: http://webisa.webdatacommons.org/267883578

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	BACKGROUND OF THE INVENTION Field of the invention Hospital and out-patient equipment, particularly oxygen feeding tubes.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es