A Patent Holder’s Silence Can Be Deafening: Key Takeaways from Fraunhofer v. Sirius XM

In Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. v. Sirius XM Radio Inc., No. 1:17-cv-00184-JFB-SRF (D. Del. Mar. 24, 2026), the U.S. District Court for the District of Delaware held that Sirius XM Radio (SXM) successfully established the defense of equitable estoppel, barring Fraunhofer’s patent infringement suit….
By: Baker Donelson