A vehicle monitoring apparatus includes a rear video camera mounted on a rear portion of a vehicle, a right video camera mounted on a right sideview mirror, a left video camera mounted on a left-sideview mirror, a mirror-effect circuit connected across two poles of a pair of horizontal deflection coils...http://www.google.com/patents/US5574443?utm_source=gb-gplus-sharePatent US5574443 - Vehicle monitoring apparatus with broadly and reliably rearward viewing
