On December 31st, Unified Patents (Unified) filed an inter-partes review (IPR) against patent owner Personalized Media Communications (PMC) in order to protect Content Delivery technologies from invalid NPE assertions. PMC claims its patents cover the encryption and decryption of digital content. Most recently, PMC sued Amazon in September, 2013. On September 22, Amazon filed an IPR against PMC's patents, U.S. Pat. Nos. 7,805,749 and 7,801,304. Unified filed its own IPRs challenging claims 2, 3, 9-13, 18, 24, 49, 52-53 of the '749 patent and 1, 11, 16, 18, 22–24 of the '304 patent. A copy of the filings can be found below.