276 A.2d 556 Township of Ohio v. Builders Enterprises, Inc. Commonwealth Court of Pennsylvania.Argued February 16, 1971 April 23, 1971. Zoning — Appeals — Nonconforming use — Res judicata — Errors of law. 1. Where, in an action in mandamus, a court is confronted with a question whether an applicant for a zoning permit has […]