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According to a copy of the suit, Discovery charges that Amazon violated its patent for Electronic Book Security and Copyright Protection System. The patent, U.S. 7,298,851, was issued to Discovery Communications by the U.S. Patent and Trademark Office on Nov. 20, 2007, per the lawsuit filing (PDF). It was initially filed in 1999.

"Kodak has prioritized its patent portfolio and the Eastman Business Park since it declared bankruptcy in 2012. Despite some success, the company might never live up to the legacy of its own past. Produced by: Colin Archdeacon and John Woo Read the story here: http://nyti.ms/1I62hyj Subscribe to the Times Video newsletter for free and get a handpicked selection of the best videos from The New York Times every week: http://bit.ly/timesvideonewsletter Subscribe on YouTube: http://bit.ly/U8Ys7n Watch more videos at: http://nytimes.com/video " YouTube: http://www.youtube.com/watch?v=JDzQ1gx71EI

September 5, 2006 Abstract A method for managing expedited communication functions for a mobile device having a processing subsystem ...