businesswire.com · Dec 3, 2025
Federal Circuit Court of Appeals Vacates Infringement Judgment and Damages Award in Dispute between Daiichi Sankyo and Seagen
TOKYO & BASKING RIDGE, N.J.--(BUSINESS WIRE)--On December 2, the U.S. Court of Appeals for the Federal Circuit (the Federal Circuit) reversed a decision from the U.S. District Court for the Eastern District of Texas that found Seagen Inc's U.S. Patent No. 10,808,039 (the '039 patent) not invalid (the Texas decision). In view of the reversal, the Federal Circuit vacated the Texas court's related infringement judgment and damages award against Daiichi Sankyo. In a separate decision, the Federal C.

