American Totalisator Co., Inc. v. Seligman ( 1980 )
Callahan v. Pennsylvania State Police ( 1981 )
Pa. Ind. for B. & H. v. Dept. of Gen. Serv. ( 1988 )
On-Point Technology Systems, Inc. v. Commonwealth, Department of Revenue ( 2000 )
At & T Communications of Pennsylvania, Inc. v. Pennsylvania Public Utility Commission ( 1990 )