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The full case caption appears at the end of this opinion.

On summary judgment, the United States District Court for the Eastern District of Michigan determined that the VirusScan product of McAfee Associates, Inc. (MC) [FOOTNOTE *] does not literally infringe Hilgraeve Corporation’s U.S. Patent No. 5,319,776 (the ’776 patent). See Hilgraeve Corp. v. McAfee Assocs., Inc., 70 F. Supp. 2d 738 (E.D. Mich. 1999). The district court also estopped Hilgraeve from arguing that VirusScan infringes any claim of the ’776 patent under the doctrine of equivalents. This court affirms the district court’s finding that prosecution history estoppel bars application of the doctrine of equivalents. This court vacates, however, the grant of summary judgment of no literal infringement and remands for appropriate further proceedings.

 
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