The August 1941 adoption of the Federal Communications Commission's "duopoly" rule restricted licensees from operating more than one radio station in a given market. At this time the Crosley Corporation owned both WLW and WSAI, so to conform with the new regulation in 1944 WSAI was sold to Marshall Field. The next year Crosley sold WLW to the Aviation Corporation of the Americas (Avco), earning a handsome return on his original investment of a quarter-century earlier. The Crosley name was so well respected that Avco retained it as the name of its broadcast division until 1968.