This morning, the Federal Circuit released one precedential opinion, one nonprecedential opinion, and one nonprecedential order. The precedential opinion affirms a decision of the Patent and Trademark Office not to apply interference estoppel and to invalidate challenged patent claims as obvious. The nonprecedential opinion comes in a case appealed from the Court of Appeals for Veterans Claims. The nonprecedential order denies a petition for a writ of mandamus. Here are the introductions to the opinions and order.