Patent Case Watch

Patent opinions from the Eastern District of Texas and the U.S. Court of Appeals for the Federal Circuit

Weekly Digest

Daubert / Expert Challenges

Expert testimony is central to patent litigation, and a Daubert motion asks the court to exclude it as unreliable before the jury hears it. The court acts as a gatekeeper, examining whether the expert is qualified, whether the methodology is sound, and whether it has been applied reliably to the facts of the case. In patent cases these motions most often target damages experts, whose royalty models must be tied to the facts and properly apportioned, and technical experts whose infringement or invalidity opinions must apply the court's claim construction. The opinions collected here include rulings excluding testimony outright, limiting its scope, and denying exclusion while leaving the weaknesses to cross-examination.

453 opinions and orders, showing 401–453.