Viatris, Mylan Pharmaceuticals and other defendants were slapped with a patent infringement lawsuit Friday in Pennsylvania Western District Court. The lawsuit was brought by Eckert Seamans Cherin & Mellott and Desmarais LLP on behalf of Johnson & Johnson subsidiary Momenta Pharmaceuticals, which asserts two patents related to the injection of medicine to treat multiple sclerosis. Counsel have not yet appeared for the defendants. The case is 2:22-cv-00750, Momenta Pharmaceuticals, Inc. v. Mylan Pharmaceuticals, Inc. et al.