<http://webisa.webdatacommons.org/prov/159636547>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/234059578> .
<http://webisa.webdatacommons.org/234059578>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<freepatentsonline.com> .
<http://webisa.webdatacommons.org/234059578>	<http://www.w3.org/ns/prov#value>	"Consequently, the process of inspecting a ladder rail for wear and tear, stress cracks, and other damage can be rather time-consuming and cumbersome in that the ladder boot must first be removed for the inspection and then put back on the ladder rail after the inspection." .
<http://webisa.webdatacommons.org/prov/306870967>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/234059578> .
<http://webisa.webdatacommons.org/234059578>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .