A selectively variable window tinting system for limiting a passage of both visible light and radiative heat through an automobile window. Embodiments of the system include window glass assemblies which utilize photochromatic glass, electrochromatic glass, and a pair of spaced glass panes fillable with...http://www.google.com/patents/US5390045?utm_source=gb-gplus-sharePatent US5390045 - Adjustable window tinting system
