591 A.2d 8 William HELM, Petitioner, v. WORKMEN’S COMPENSATION APPEAL BOARD (U.S. GYPSUM COMPANY), Respondent. Commonwealth Court of Pennsylvania.Submitted December 21, 1990. Decided May 9, 1991. Appeal from the Workmen’s Compensation Appeal Board, No. A89-1690. Page 588 Brian R. Steiner, for petitioner. Deborah L. Hartwell, for respondent. Page 589 Before SMITH and PELLEGRINI, JJ., and […]