About: http://webisa.webdatacommons.org/257070091

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	An improvement according to claim 6 or 7, further including a piezoelectric element for moving the flapper member in accordance with a signal from the electronic circuit.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es