About: http://webisa.webdatacommons.org/439990803

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	That is, one of the levels is installed on the top of the doorjamb and snuggly fits along the top horizontal surface of the doorjamb and partially down each side of the two vertical surfaces of the doorjamb.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com