About: http://webisa.webdatacommons.org/124011692

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	Base 20 can be made of any material, such as wood, metal, nonmetal, plastic or other composites.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com