After Court Ruling, US Still In Disarray On Software Patents 20/05/2013 by Steven Seidenberg for Intellectual Property Watch 2 Comments What inventions are eligible for patent protection? That question has roiled the US legal system for the last decade. But the Federal Circuit Court of Appeals (often called the nation’s patent court) was supposedly riding to the rescue. The court’s eagerly-awaited en banc decision in CLS Bank Int’l v. Alice Corp. [pdf] was widely expected to clarify the patentability of computer-related inventions, which play a vital role in the US economy. Unfortunately, instead of clarifying the law, the court’s 10 May ruling increased the confusion, casting doubt on more than 300,000 patents – including one-fifth of all patents issued last year.