About: http://webisa.webdatacommons.org/364929963

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	However, the present invention is not limited to such an embodiment and other materials such as plastic, metals, composite materials and wood can be used for the first air mat 20.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com