Patent 7611439 was granted and assigned to Hyundai Motor Company on November, 2009 by the United States Patent and Trademark Office.
A power train of an automatic transmission realizing seven forward speeds and three reverse speeds includes an input shaft, an output gear, a transmission case, a speed reduction unit, an output unit, a first clutch, a second clutch, a third clutch, a fourth clutch, a first brake, and a second brake.