
    SIDE-O-MATIC UNLOADER CORPORATION, Appellant v. ALIQUIPPA BLOCK & SUPPLY COMPANY, Bopp Manufacturing Company, and Waterloo Unloader Corporation.
    No. 13520.
    United States Court of Appeals Third Circuit.
    Argued Oct. 20, 1961.
    Decided Dec. 4, 1961.
    Arnold B. Christen, Washington, D. C. (Fisher, Christen, & Goodson, Washington, D. C., Charles Hercus Just, York, Pa., Julian Miller, Brown, Critchlow, Flick, & Peckham, Pittsburgh, Pa., on the brief), for appellant.
    Elmer S. Utzler, Pittsburgh, Pa. (Wm. H. Parmelee, Pittsburgh, Pa., on the brief), for appellees.
    
      Before KALODNER, HASTIE and GANE Y, Circuit Judges.
   PER CURIAM.

Upon review of the record we find no error.

The judgment of the District Court will be affirmed on the opinion of Judge Marsh, 188 F.Supp. 510 (W.D.Pa.1960).  