Patent 7148794 was granted and assigned to Rf Monolithics, Inc. on December, 2006 by the United States Patent and Trademark Office.
A vehicle back-up alarm system includes a sensor capable of determining when a vehicle is at least one of in a reverse gear and moving backwards. The vehicle back-up alarm system also includes a transmitter module capable of transmitting a warning signal in response to the sensor determining that the vehicle is at least one of in the reverse gear and moving backwards.