Court of Appeals for the Third Circuit June 1931 casesUnited States v. EngelsbergLehigh Valley R. Co. v. JonesCohen v. United StatesBadamo v. FormanClapp v. HeinerE.I. DU PONT DE NEMOURS CO. v. HUGHESRiggs v. Commissioner of Internal RevenueMaryland Cas. v. New Jersey Shipbuilding DKotabs v. Kotex Co.United States v. DayScalp Level Coal Min. v. New Eng. Coal CokeBrown v. Commissioner of Internal Revenue