A toy wheeled vehicle such as a toy truck which is intended to be pushed along by a child includes electronic circuitry which is capable of emitting a plurality of different sounds similar to the sounds of a real truck. The actual sound of a truck's internal combustion engine is digitized and stored...http://www.google.es/patents/US4946416?utm_source=gb-gplus-sharePatente US4946416 - Vehicle with electronic sounder and direction sensor
Vehicle with electronic sounder and direction sensor
