The ruling revives MPH Technologies’ patent infringement claims against Apple, which had been stipulated away following the district court’s adverse claim construction rulings. MPH Technologies Oy filed a patent infringement lawsuit against Apple in the U.S. District Court for the Northern District of California, accusing Apple of infringing five related ‘949 patents, as well as a separate patent, U.S. Patent No. MPH asserted the ‘949 patent family against Apple’s secure messaging services and asserted the ‘581 patent against Apple’s virtual private network offerings. The district court also held that claims 6, 7, and 8 of the ‘581 patent were indefinite, based on the limitation covering “the secure connection.” The Federal Circuit also rejected Apple’s argument that dependent claim 8 of the ‘949 patent supported a narrower construction because it referenced “the IPSec connection.”