An in-car navigation apparatus produces a concept of a voice message such as a guide of an advancing route or a guide of an arrival to be informed at a point on a set drive route where voice information is to be given by means of the control section thereof, and produces a message sentence from a...http://www.google.com/patents/US5799264?utm_source=gb-gplus-sharePatent US5799264 - In-car navigation apparatus with voice guidance
