(December 5, 2016, 10:03 AM EST) -- WASHINGTON, D.C. — Two inter partes re-examinations by the U.S. Patent Trial and Appeal Board that led to findings of patent invalidity were proper, the Federal Circuit U.S. Court of Appeals ruled Dec. 2 (Dako Denmark A/S v. Leica Biosystems Melbourne Party Ltd., No. 16-1000, Fed. Cir.)....