Comcast Corp., the largest U.S. cable company, sued a unit of Sprint Nextel, alleging infringement of four telecommunications patents.
Comcast “has been irreparably harmed by that infringement and will suffer additional damages,” unless the court prevents additional infringement, lawyers for the company said in a complaint filed in Delaware federal court.
Scott Sloat, a spokesman for Overland Park-based Sprint, said the company couldn't immediately comment on the lawsuit.
Comcast contends that services provided by Sprint, the nation's third-largest wireless phone company, misappropriate technology used for accessing communication data, determining a telephone number and optimizing a telephony network.
Comcast last week filed a separate suit against Sprint claiming infringement of four other telecommunication patents in federal court in Philadelphia. Sprint sued Philadelphia-based Comcast and three other cable companies in December alleging infringement of patents related to transmitting phone calls over digital lines.