About: http://webisa.webdatacommons.org/129059396

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	All structural components of the -preferred embodiment of the invention are constructed from a rigid material, such as, for example but not in limitation, plywood or polystyrene.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com