Federal Circuit April 1978 casesCentral Nat. Life Ins. Co. of Omaha v. U.S.Switlik Parachute Co., Inc. v. United StatesEgley v. United StatesInvestors Diversified Services, Inc. v. U.S.Narva Harris Const. Corp. v. United StatesTektronix, Inc. v. United StatesRutherford v. United States