Federal Circuit October 1980 casesNorthern Helex Co. v. United StatesEastman v. United StatesPhiladelphia Regent Builders v. United StatesGnagy v. United StatesSOL WALKER CO. v. UNITED STATESNorthern Paiute Nation v. United StatesErika, Inc. v. United StatesNelson-Ricks Creamery Co. v. U.S.