A navigation device performs a route guidance based on a route from a current location to a destination. A communication controller sends a request for searching the route to a server. A guidance-information receiving unit receives information on the route from the server. A time measuring unit measures...http://www.google.com.tw/patents/US7917287?utm_source=gb-gplus-share專利 US7917287 - Navigation device, navigation method, and computer product
