“Cisco Systems this week filed a federal lawsuit against TiVo, seeking to void four of the DVR maker’s patents — including the infamous “Time Warp” patent that Dish Network was found to have infringed — opening a new front in the litigation battle over cable set-tops.
TiVo declined to comment.
Separately, TiVo is suing two of Cisco’s big service-provider customers — Verizon Communications and Time Warner Cable — alleging patent infringement, and has legal action pending against Motorola Mobility as well.”
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