About: http://webisa.webdatacommons.org/13240862

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	said self-contained electromagnetic device being operable, upon energization by energizing circuit, to generate an alternating magnetic field which is such as to induce an alternating signal in said sensing circuit;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com