Subsidiary of Marathon Patent Group Files Patent Lawsuit Against Sony, Siemens and Others

ALEXANDRIA, VA -- (Marketwire) -- 03/21/13 -- Marathon Patent Group, Inc. (OTCBB: MARA), an Intellectual Property services and Monetization Company, announced today that its subsidiary Sampo IP, LLC ("Sampo") has filed a patent infringement lawsuit in the United States District Court for the Eastern District of Texas against Sony Computer Entertainment America LLC, Siemens Energy, Inc., CB Apex Realtors, d/b/a Coldwell Banker Apex Realtors, Blue Cross and Blue Shield Association, Juniper Networks, Inc., Winn Dixie Stores, Inc., and Dell, Inc. (the "Defendants").

Sampo is asserting three causes of action involving patent infringement related to U.S. Patent numbers 6,161,149, 6,772,229, and 8,015,495, all entitled Centrifugal Communication and Collaboration Method. The lawsuit alleges that the Defendants have infringed, and continue to infringe, the claims of the patents in suit by using the accused communications systems and methods covered by the claims of the Sampo patents.

About Marathon Patent Group

Marathon Patent Group ("MPG") is an intellectual property services and monetization company that serves a wide range of patent holders and technologies from Fortune 500 to independent inventors. MPG provides clients advice and services that enable them to realize financial and strategic return on their IP rights. MPG serves clients through two complimentary business units: the IP Research & Services Center, which helps to identify and manage patents, and the IP Licensing and Enforcement Group, which acquires IP assets, partners with patent holders, and monetizes patent portfolios through actively managed patent licensing campaigns. MPG is based in Alexandria, Virginia. www.marathonpg.com

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