About: http://webisa.webdatacommons.org/152937582

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	In a preferred form of the invention, the base 38 is flat and generally circular shaped, but may be of any suitable shape such as rectangular.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com