Gray v. Phila. Reading Coal I. Co. , 286 Pa. 11 ( 1926 )
Brush v. Lehigh Valley Coal Co. , 290 Pa. 322 ( 1927 )
Wortex Mills, Inc. v. Textile Workers Union of America , 380 Pa. 3 ( 1954 )
Greyhound Lines, Inc. v. Peter Pan Bus Lines, Inc. , 845 F. Supp. 295 ( 1994 )