Claiming that digital set top boxes marketed by Cablevision infringe upon five patents relating to the Verizon FiOS IPTV service, Verizon Communications targeted Cablevision in a patent lawsuit filed with a Delaware district court and in a related complaint, filed simultaneously with the U.S. International Trade Commission (ITC), that seeks to block imports of the set top boxes in question. Filed on Tuesday, the complaints constitute the newest front in an escalating turf war between Verizon and Cablevision over video service customers in New York and other areas in the northeastern U.S. After Cablevision announced plans to launch an ultra high-speed Internet service of 101 Mbps that doubles the top speed available on Verizon’s FiOS network, Verizon countered by offering a $75 discount to Cablevision subscribers who switch to FiOS. According to sources, the patents Cablevision is accused of infringing relate to set-top boxes that come with advanced features such as games, local weather reports and social networking as well as the ability to download videos. Declaring that the patents in question “enable Verizon to offer more advanced and differentiated products and services than its competitors,” Verizon termed each of the infringed patents as “important to Verizon’s success in the highly competitive fields of digital video and entertainment services.” In addition to seeking injunctive relief, Verizon is also asking the court for monetary damages. Vowing “a vigorous defense,” a Cablevision spokesman replied, “it is becoming increasingly clear that Verizon is having difficulty competing on the merits in the marketplace.”