About: http://webisa.webdatacommons.org/193002778

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 check valve assembly, Fig. 17, indicated generally at C, is the same in construction and purpose as the similar mechanism shown in each of the preceding forms of the invention.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com