VirnetX, Inc. v. Cisco Sys., Inc., No. 13-1489 (Fed. Cir. 2014)
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The plaintiffs’ patents claim technology for providing security over networks and assert priority to applications filed in the 1990s. They share a specification disclosing a domain name service system that resolves domain names and facilitates establishing “secure communication links.” In one embodiment, an application on the client computer sends a query including the domain name to a “secure domain name service,” which contains a database of secure domain names and corresponding secure network addresses. This allows a user to establish a secure communication link between a client computer and a secure target network address. The accused product, Apple’s FaceTime feature, allows secure video calling between select Apple devices: a caller enters an intended recipient’s e-mail address or telephone number into a device (e.g., iPhone). An invitation is sent to Apple’s server, which forwards the invitation to a network address translator which, in turn, readdresses the invitation and sends it on to the receiving device. The recipient may accept or decline the call. If accepted, servers establish a secure FaceTime call. A jury found infringement and that none of the infringed claims were invalid and awarded damages of $368,160,000. The Federal Circuit affirmed that none of the asserted claims are invalid; that many are infringed by Apple’s product; and the exclusion of evidence relating to the reexamination of the patents-in-suit. The court reversed a finding that the product infringes one claim under the doctrine of equivalents and the court’s construction of the claim term “secure communication link.”