AT&T, Verizon, CenturyLink, Windstream face DSL patent suits

Patent holding company Intellectual Ventures is accusing AT&T (NYSE: T), CenturyLink (NYSE: CTL) and Windstream of violating several of its patents related to DSL technology in a lawsuit that was filed last week. In a separate lawsuit, Brandywine Communications Technologies alleges that Verizon (NYSE: VZ), AT&T and CenturyLink have violated its intellectual property with their DSL products. FierceTelecom takes a closer look at the litigation. Read more