SHACKELFORD MILLER, Jr., Circuit Judge.
This action involves the validity and alleged infringement of United States Patent No. 2,750,216 issued to Paul E. Thies on June 12, 1956, for an invention relating to toilet bowl sleeve gaskets. The District Judge held the patent valid and infringed.
Prior to 1953 the plaintiff Thies had been a journeyman plumber, a master plumber and proprietor of a plumbing,
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