About: http://webisa.webdatacommons.org/232825997

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	This invention relates to radio ranging, location, and navigation systems and more particularly to systems for indirectly finding distances which cannot be measured directly, with correction for systematic errors.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca