The U.S. Supreme Court dropped a bombshell on the patent world with its May venue ruling in TC Heartland v. Kraft Foods Group Brands. The court overruled a 1990 Federal Circuit decision that essentially let patent owners sue in the judicial district of their choice–often the Eastern District of Texas. TC Heartland has forced patent owners to sue more often in Delaware, which is dealing with a judge shortage, and California, which is perceived as more defense-friendly. The Federal Circuit is now hashing out how TC Heartland should apply to cases already pending.