(September 18, 2017, 12:13 PM EDT) -- WASHINGTON, D.C. — A concession by two declaratory judgment defendants that they currently hold no title to a patent portfolio and that they will not hold title until a court determines otherwise are fatal to two declaratory judgment plaintiffs’ assertion of federal subject matter jurisdiction over a dispute over ownership of the same patent portfolio, the Federal Circuit U.S. Court of Appeals affirmed Sept. 15 (First Data Corporation et al. v. Eric Inselberg et al., Nos. 2016-2677, -2696, Fed. Cir.)....