485 A.2d 886 Roger L. Patterson, Petitioner v. Workmen’s Compensation Appeal Board (Wayne W. Sell Corporation), Respondents. Commonwealth Court of Pennsylvania.Argued November 13, 1984 January 2, 1985. Workmen’s compensation — Employer-employee relationship — Truck rentals. 1. For workmen’s compensation purposes the existence of an employer-employee relationship must be determined on a case-by-case basis; the crucial […]