4. TiVo fight for DVR Technology

This was one of the longest running patent cases. In 2004, TiVo sued Dish and Echostar (when they were still one company), for copying the company's DVR technology, which is a system for recording television programs. It was introduced in 1999, and allows users to record television shows as well as search for shows to record based on their interests though the "WishList" option. When the DVR is connected to a home network, users can perform an advanced search, online scheduling, download movies and television shows, and view personal photos. 

Initially the court gave the verdict in favour of TiVo but then agreed to reconsider it. After 5 long years, Dish and Echostar agreed to shell out $500 million to settle the case last year. In addition, TiVo granted Dish Network a license under its Time Warp patent. As for EchoStar, TiVo granted it a license under the same patent.