About: http://webisa.webdatacommons.org/156605969

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	Several state-of-the-art devices are known, for instance disclosed in registrations such as European Patent 90121288.6, Utility Model no. 9203290/7, Utility Model 9501364/4, and others.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com