About: http://webisa.webdatacommons.org/264118951

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	It is to be noted that although a touch-tone pad is here illustrated as being the actuating means, any other pulse actuating means may be substituted, such as a dial system, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com