About: http://webisa.webdatacommons.org/75855541

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	The nose mask as claimed in claim 1 wherein said gas delivering and dispersing means is a narrow slit extending across a portion of the surface of said gas delivery tube. 13.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com