In a mobile station for use in radio communication with a selected station selected from a plurality of base stations which are placed at different positions and which have station numbers, respectively, position data are previously memorized in an RAM (13) in a form in which the position data are dependent...http://www.google.com/patents/US5894599?utm_source=gb-gplus-sharePatent US5894599 - Mobile station with a function which enables a user to easily recognize a current position
