A brake controller for use in a tow vehicle to control the application of towed vehicle brakes. The brake controller is responsive to movement of the tow vehicle brake pedal to send electronic brake control signals to the towed vehicle brakes, actuating the brakes in proportion to the movement of the...http://www.google.es/patents/US6050649?utm_source=gb-gplus-sharePatente US6050649 - Brake controller