Method and apparatus providing supplementary navigation data to be used with a vehicular navigation system. The supplementary navigation data can be superimposed over primary navigation data on a navigation system display or can be presented as a split-screen display. The supplementary navigation data...http://www.google.ca/patents/US6185501?utm_source=gb-gplus-sharePatent US6185501 - Methods and apparatus for loading or modifying a vehicle database from a remote computer via a communications network and a fuel or current dispenser
