Columbia Gas & Electric Corporation. Nos. 9775-77, in circuit court of appeals for 6th circuit, Columbia Gas & Electric Corporation v. United States, Ben Williamson, jr., trustee of Inland Gas Corporation, et al.; [same] v United States, Ben Williamson, jr., trustee of Kentucky Fuel Gas Corporation, and Morris Green; [same] v. United States, Clinton M. Harbison, trustee for American Fuel and Power Company, et al.; brief for United States.