The Federal Circuit affirmed in part, reversed in part, and remanded the decision of a federal district court in Texas in Exafer Ltd.'s action against Microsoft Corp. for infringement of patents that relate to systems and methods for optimizing communication paths between virtual network devices by controlling data forwarding rules at intelligent switches. The appeals court reversed the district court’s order excluding Exafter’s expert’s damages report, vacated as moot the district court’s order denying Exafer’s motion to reopen fact and expert discovery, and vacated the district court’s grant of summary judgment based on absence of a remedy.