A U.S. trial court recently allowed a patent owner plaintiff to proceed at trial on asserted patent claims that had previously been found by the PTAB to be invalid in an IPR, while at the same time preventing the winning IPR petitioner defendant from asserting its already successful prior art defenses against the same allegedly infringed patent claims, based on AIA petitioner estoppel under 35 U.S.C. § 315(e)(2). The trial court acknowledged that this result “seems counterintuitive,” and overlooked the fact that the CAFC has already suggested that this result is simply wrong, not merely counterintuitive. READ MORE