No. 2009-1504.

598 F.3d 831 (2010)

I4I LIMITED PARTNERSHIP and Infrastructures for Information Inc., Plaintiffs-Appellees, v. MICROSOFT CORPORATION, Defendant-Appellant.

United States Court of Appeals, Federal Circuit.

March 10, 2010.

Attorney(s) appearing for the Case

Donald R. Dunner, Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P., of Washington, DC, argued for plaintiffs-appellees. With him on the brief were Don O. Burley, Kara F. Stoll and Jason W. Melvin; and Erik R. Puknys, of Palo Alto, CA. Of counsel on the brief were Douglas A. Cawley and Jeffrey A. Carter, McKool Smith, P.C. of Dallas, TX, and T. Gordon White, of Austin, TX.

Matthew D. Powers, Weil, Gotshal & Manges LLP, of Redwood Shores, CA, argued for defendant-appellant. With him on the brief were Kevin S. Kudlac and Amber H. Rovner, of Austin, TX. Of counsel on the brief were Matthew D. McGill, Minodora D. Vancea, Gibson, Dunn & Crutcher LLP, of Washington, DC; and Isabella E. Fu, Microsoft Corporation, of Redmond, WA. Of counsel was David J. Lender, Weil, Gotshal & Manges LLP, of New York, NY.

John W. Thornburgh, Fish & Richardson, P.C., of San Diego, CA, for amici curiae Dell Inc. and Hewlett-Packard Company. With him on the brief were John E. Gartman; and Indranil Mukerji, of Washington, DC.

Richard A. Samp, Washington Legal Foundation, of Washington, DC, for amicus curiae Washington Legal Foundation, of Washington, DC. With him on the brief was Daniel J. Popeo.

Before SCHALL, PROST, and MOORE, Circuit Judges.

PROST, Circuit Judge.

This is a patent infringement case about an invention for editing custom XML, a computer language. The owner of the patent, i4i Limited Partnership ("i4i"), brought suit against Microsoft Corporation ("Microsoft"), alleging that the custom XML editor in certain versions of Microsoft Word ("Word"), Microsoft's word-processing software, infringed i4i's patent. After a seven-day trial, the jury found Microsoft liable for willful infringement. The...

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