federal circuit

The federal circuit tag covers discussions of the United States Court of Appeals for the Federal Circuit, particularly its patent law decisions. Recent content focuses on the 2026 Exafer Ltd. v. Microsoft Corp. case, where the federal circuit reversed a district court ruling that excluded damages testimony. The court held that a reasonable royalty can be based on unaccused product metrics, such as Azure virtual machine hours, if a causal connection exists between the accused features and the product's value. This decision clarifies that Daubert standards do not automatically bar such damages theories. The tag is relevant for readers interested in patent litigation, damages calculations, and appellate rulings affecting technology companies.