79 A.2d 218 Alan Porter Lee, Inc. v. Du-Rite Products Company, Inc. (et al., Appellant). Supreme Court of Pennsylvania.January 8, 1951. March 19, 1951. Mechanics’ liens — Architects and engineers — Preparation of plans and drawings — Active supervision of work — Necessity — Words and phrases — Superintend — Breach of contract — Unliquidated […]