United States Court of Appeals, Sixth Circuit.https://leagle.com/images/logo.png
April 15, 1952.
April 15, 1952.
Attorney(s) appearing for the Case
Clarence B. Zewadski, Detroit, Mich., William M. Yates, Midland, Mich. (Clarence B. Zewadski, Detroit, Mich., William M. Yates, Midland, Mich., on the brief), for appellant.
William H. Parmelee, Pittsburgh, Pa., Leo T. Wolford, Louisville, Ky., (F. Norman Higgs, Bay City, Mich., Christy, Parmelee & Strickland, William H. Parmelee, and Lewis Neilson, all of Pittsburgh, Pa., on the brief), for appellees.
Rockwell T. Gust, Detroit, Mich, John F. Oberlin, Cleveland, Ohio, Karl B. Lutz, Pittsburgh, Pa., on brief, amicus curiae.
Before ALLEN, MARTIN and MILLER, Circuit Judges.
United States Court of Appeals, Sixth Circuit.
ALLEN, Circuit Judge.
This appeal arises out of an action for infringement of Skinner patent 1,847,365 for extrusion of metal. The application was filed March 25, 1930, and the patent issued March 1, 1932. Claims 1, 3, 4, 5, and 6 are in issue. The Dow Chemical Company (hereinafter called Dow) asserts invalidity of the Skinner patent and denies infringement. The District Court held all claims valid and infringed.
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