in the hip, knees, and ankles by supporting a portion of the person's bodyweight. The device has a simple structure consisting of a seat, frame, and shoes, and weighs 6.5kg, including the shoes and the battery. The device is operated on a lithium ion battery and can remain operational for about two hours on a single charge. Natural walking is achieved by changing the amount of assisting force applied to the right and left legs through the control of two motors, based on the information ...