WD Pennsylvania February 1928 casesPenn Smokeless Coal Co. v. LewellynIn re BuchananHarmar Coal Co. v. HeinerIn re HallFrench Clay Blending Co. v. LewellynUnion Trust Co. v. HeinerIndianola Coal Co. v. HeinerHarbison v. LewellynHurst, Anthony Watkins v. HeinerBessemer Coal Coke Co. v. HeinerPittsburgh Bridge Iron Works v. Heiner