<http://webisa.webdatacommons.org/241221575>	<http://www.w3.org/ns/prov#value>	"preferably of low friction material such as Tefon (i.e., polytetrafluoroethylene)." .
<http://webisa.webdatacommons.org/prov/283293904>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/241221575> .
<http://webisa.webdatacommons.org/241221575>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patents.com> .
<http://webisa.webdatacommons.org/241221575>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .