About: http://webisa.webdatacommons.org/59215197

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	Although an LED and a phototransistor are shown, there may be other types of optical elements which could be suitable for use with the present invention.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr