Over the last decade, the Patent Trial and Appeal Board has emerged as the nation's busiest patent court, litigating a large number of patent validity disputes through inter partes review (IPR) proceedings. Patent Office Director Kathi Vidal has been very active since she was sworn in six months ago. The new director has invoked her director review power to reconsider the board's decisions 10 times, issuing six decisions to date spanning a broad range of issues. Below is a snapshot of her director review decisions so far, and a preview of what is on the horizon.