Microsoft Files Request Against VirnetX

Scott Daniels | November 25, 2009

Microsoft filed today a request for inter partes reexamination of U.S. Patent No. 7,188,180.

The ‘180 patent is entitled METHOD OF ESTABLSIHING SECURE COMMUNICATION LINK BETWEEN COMPUTERS OF VIRTUAL PRIVATE NETWORK. It is owned by VirnetX, which had earlier sued Microsoft in the Eastern District of Texas for infringement of that patent, as well as of two other patents.

VirnetX’s law suit against Microsoft began in early 2007 and may be nearing an end with a trial set to start March 8, 2010.

On July 30, 2009, Judge Davis entered a claim construction order. That order may be the basis for Microsoft’s request.

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