A distance measuring and display system for use on a vehicle having a mirror assembly thereon comprises at least one front distance measuring sensor for measuring the distance to an obstacle in front of the vehicle, at least one rear distance measuring sensor for measuring the distance to an obstacle...http://www.google.com.au/patents/US20040080431?utm_source=gb-gplus-sharePatent US20040080431 - Distance detection and display system for use in a vehicle
