This morning the Federal Circuit released a precedential opinion in a patent case appealed from the District of Delaware. In its opinion, the Federal Circuit affirmed the district court’s dismissal of a patent infringement complaint under the duplicative-litigation doctrine. The Federal Circuit also released three nonprecedential opinions. The first and second opinions come in veterans cases appealed from the Court of Appeals for Veterans Claims; the third comes in an employment case appealed from the Merit Systems Protection Board. Here are the introductions to the opinions.