A system to overcome the visual aberration of spherical automotive rear view mirrors, related to the distance between vehicles, requires no measurement or mathematical skills. The system includes means for visually determining the curvature of a mirror, and templates for the proper placement of etched...http://www.google.fr/patents/US5644442?utm_source=gb-gplus-shareBrevet US5644442 - Spherical rear view mirror target marking system and method
Spherical rear view mirror target marking system and method
