Cox ups patent battle with AT&T, claims three infringements

A patent battle between Cox Communications and AT&T (NYSE: T) has escalated, with the cable company this time suing the wireless giant for alleged infringement of three registered patents. 

The suit, filed in an Atlanta federal court Monday, May 11, follows a suit filed in September by AT&T against Cox, also for infringed pay-TV patents. 

The latest complaint accuses AT&T U-verse of infringing Cox's patents for a "method and system for using Multicast using multiple transport streams," "generating a personalized video mosaic in a cable services network," and "access system and method for providing interactive access to an information source through a television distribution system."

Cox didn't specify monetary damages, but it does seek a permanent injunction on AT&T's alleged use of the technologies in question. 

Neither Cox nor AT&T has yet responded to FierceCable's inquiries for comments or statements. 

Cox has a fairly recent history of fighting hard in patent battles, notably beating back Verizon (NYSE: VZ) in a fight over VoIP patents in 2008.

For more:
- read this Cox Communications lawsuit
- read this Atlanta Business Journal story
- read this Seeking Alpha post

Related links:
Delaware court says Comcast owes Sprint $27.6M for patent infringement
Court rules Dish Anywhere does not infringe on broadcaster copyrights like Aereo
AT&T accuses Cox of making 'billions' off infringed patents

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