Open Invention Network has announced it has decided to look for prior art on three of the Microsoft patents that were used in the TomTom litigation: Open Invention NetworkSM (OIN), a collaborative enterprise that enables innovation in open source and an increasingly vibrant ecosystem around Linux, today announced that U.S. patents 5579517, 5758352 and 6256642 have been placed for prior art review on the Post-Issue Peer-to-Patent website associated with the Linux Defenders portal.

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