About: http://webisa.webdatacommons.org/277304971

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	In the -accompanying drawing, the figure is a block and circuit diagram sho-wing the elements of a signalling system including the remote station sound alarm apparatus which is the specific embodiment of the described.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com