US Patent 7696865 Electronic message board for vehicles and associated method

An electronic message board includes a housing removably affixed to an interior surface of a selected window of a vehicle. Such housing is visible to another driver during driving conditions and includes a back wall with front and rear planar surfaces respectively and a first electrically conductive plate with a planar rear surface directly attached to the front surface of the back wall. The message board further includes a light display removably interfitted within the housing, a light emitting diode array, a transparent faceplate with predetermined indicia formed in a front surface thereof, and a mechanism for selectively actuating the light display.