US Patent 7121315 Automobile sunshade

A sunshade includes a fabric shelter, which is sized and shaped adapted for sheltering a window of a window frame of a vehicle, having a heat blocking side for blocking heat radiation of sunlight from entering into the vehicle through the window frame, and a retention frame having at least two resilient retention portions spacedly mounted along a peripheral edge of the fabric shelter, wherein the resilient retention portions of the retention frame is adapted to be deformed for respectively applying an urging force against corners of the window frame of the vehicle so as to substantially support the fabric shelter within the window frame while the window thereof is allowed to be normally operated.