A feed of cases that cite 317 U.S. 492. http://supreme.justia.com/ 317 U.S. 492 2007-12-13 http://supreme.justia.com/us/303/391/index.html Helvering v. Mitchell, 303 U.S. 391 (1938) 1938-1-1 http://supreme.justia.com/us/290/389/index.html United States v. Murdock, 290 U.S. 389 (1933) 1933-1-1