Judges Criticize Allergan's Use of Mohawk Tribe's Sovereignty

Allergan Plc faced a skeptical appeals court Monday as the company defended its use of an American Indian tribe’s sovereign immunity to avoid challenges to its patents from generic-drug makers. Two of three judges on the U.S. Court of Appeals for the Federal Circuit in Washington questioned whether Allergan was seeking to circumvent review by the Patent and Trademark Office. The reviews are widely used by technology companies, banks and insurers who say it offers a way to weed out bad patents.