By John Duffy, the Samuel H. McCoy II Professor of Law at University of Virginia School of Law.Although Alice Corp. v. CLS Bank was identified by this website and many other commentators as a major case on patent law, the Supreme Court’s unanimous resolution of the case does little to change, or even to clarify, pre-existing law.  The case becomes the fourth Supreme Court decision since 2010 to hold patent claims invalid based on judicial exceptions to patentability. While Alice Corp. is only an incremental addition, the continuation of that larger trend is hugely important because,...