About: http://webisa.webdatacommons.org/361769342

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	The acoustical switch defined in claim 1A. wherein the amplifier circuit has relatively high gain, and B. further including means for adjusting said gain. 3.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk