Delta Air Lines and its in-flight Wi-Fi service provider have been sued by a Massachusetts company for patent infringement. Ashland, Mass.-based Ambit Corp., a technology development firm, claims in its suit that Atlanta-based Delta and Wi-Fi provider Aircell LLC infringe on its patent for a "system for enabling communication from personal computer communication devices located within a passenger vehicle to a distant communication system located outside of said passenger vehicle," using antennae on the devices.