Amgen v. Sanofi and Regeneron: Japan IP High Court overrules its own decision on validity of Amgen patent
On January 26, 2023, Regeneron Pharmaceuticals, Inc., who sought to invalidate Amgen Inc.’s Japanese patent (JP5705288) covering an isolated monoclonal antibody used as cholesterol medication, won an appeal case in the IP High Court (Case No. 2021 (Gyo-ke) 10093). What was surprising in this case was that the IP High Court’s invalidity conclusion was the…