On July 10, 1962, N. I. Bohlin, received U.S. Patent No. 3,043,625 on a Safety Belt:

Bohlin was hired by Volvo to become its first safety engineer. Following a year of extensive testing and engineering, Bohlin realized that straps across the chest and across the hips restrained people efficiently, than a simple lap belt. His design had the added advantage of allowing a person to buckle up with just one handle.