<http://webisa.webdatacommons.org/54306266>	<http://www.w3.org/ns/prov#value>	"In addition, this aid must be cost efficient so as to be readily useable within substantially all types of buildings or homes, that is, it must be (1) economical to produce, (2) able to withstand substantial abuse, and (3) simple to install, replace and/or remove." .
<http://webisa.webdatacommons.org/prov/172137932>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/54306266> .
<http://webisa.webdatacommons.org/prov/380196272>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/54306266> .
<http://webisa.webdatacommons.org/54306266>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<freepatentsonline.com> .
<http://webisa.webdatacommons.org/54306266>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .