Authored by Michelle Carniaux and Michael E.Sander
This morning, the Federal Circuit issued its second substantive decision on an appeal of a final IPR decision, and its first remanding back to the Board, in Microsoft Corp. v. Proxyconn, Inc. See Microsoft Corp. v. Proxyconn, Inc. 2015-1542, 2015-1543 (Fed. Cir. June 16, 2015); see also IPR2012-00026, IPR2013-00109. In its decision, the Federal Circuit re-affirmed that the broadest reasonable interpretation claim construction standard applies in IPR proceedings. 2015-1542 at 6 (citing In re Cuozzo Speed Techs., LLC, 778 F.3d 1271 (Fed. Cir. 2015)). The Federal Circuit also made clear that it reviews the Board’s conclusions of law de novo and its finding of fact for substantial evidence. Id. at 2 (citation omitted). Accordingly, consistent with Teva Pharmaceuticals U.S.A., Inc. v. Sandoz, Inc., 135 S. Ct. 831 (2015), in reviewing the Board’s claim construction determinations, the Court reviews the Board’s claim constructions de novo and its underlying factual determinations involving extrinsic evidence for substantial evidence. Id. at 5-6.