Judge Again Finds Patent Claims Against Sirius XM Estopped

( March 26, 2026, 2:35 PM EDT) -- WILMINGTON, Del. — A Delaware federal judge ruled after a bench trial that Sirius XM Radio Inc. (SXM) reasonably relied on silence from a German research entity to believe it would not bring claims regarding its patents covering satellite radio technology; a Federal Circuit U.S. Court of Appeals panel determined last year that the silence was misleading....