Regeneron Pharmaceuticals, Inc. v. Mylan Pharmaceuticals Inc., Appeal Nos. 2024-1965, -1966, -2082, -2083 (Fed. Cir. Jan. 29, 2025) Our Case of the Week is a 31-page decision that touches on a variety of issues, including...more
Mirror Worlds Technologies, LLC v. Meta Platforms, Inc., Appeal Nos. 2022-1600, -1709 (Fed. Cir. Dec. 4, 2024) In this appeal from the United States District Court for the Southern District of New York, the Federal...more
In a precedential opinion, the Federal Circuit reversed a Patent Trial and Appeal Board (“PTAB”) decision in holding that certain claims of the Virtek patent (U.S. Patent No. 10,052,734) were unpatentable as obvious. See...more
Assignor Estoppel Does Not Apply in the IPR Context - In Arista Networks, Inc. v. Cisco Systems, Inc., Appeal Nos. 2017-1525, 2017-1577, the Federal Circuit held that the plain language of 35 U.S.C. § 311(a) unambiguously...more
ArcelorMittal Atlantique Et Lorraine v. AK Steel Corporation, Appeal No. 2017-1637 (Fed. Cir. Nov. 14, 2018) - In an opinion originally filed as sealed on Nov. 5 and unsealed on Nov. 18, the Federal Circuit vacated and...more
Acceleration Bay, LLC v. Activision Blizzard Inc., Appeal Nos. 2017-2084, -2085, -2095, -2096, -2097, -2098, -2099, -2117, 2118 (Fed. Cir. Nov. 6, 2018) In appeals of six inter partes review final decisions on three...more
Dell Inc. v. Acceleron, LLC (“Dell II”), No. 2017-1101 (Fed. Cir. Mar. 9, 2018) - On Tuesday, the Federal Circuit issued a precedential decision affirming the Board’s refusal to consider new arguments that had been made...more