Since the U.S. Court of Appeals for the Federal Circuit issued its opinion in Arendi S.A.R.L. v. Apple Inc. last August, many patent commentators have asserted that the decision marked a significant change in the analysis of obviousness under 35 U.S.C. § 103, especially as a weakening of single-reference obviousness grounds. Notwithstanding this decision, petitioners and the Patent Trial and Appeal Board have continued to rely on single-reference obviousness to assert and find that claims are obvious.