About: http://webisa.webdatacommons.org/48343539

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	U.S. Pat. Nos. 4,483,049 and No. 4,649,397 show prior art fasteners and assemblies over which the subject invention is an improvement.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com