RADER, Circuit Judge.
On summary judgment, the United States District Court for the Northern District of Illinois held that Coolsavings.com, Inc. (Coolsavings) did not infringe, either literally or by equivalents, the claims of Catalina Marketing International, Inc.'s (Catalina's) U.S. Patent No. 4,674,041 (the '041 patent). Catalina Mktg. Int'l, Inc. v. Coolsavings.com, Inc., No. 00C 2447, slip op. at 6-7, 2001 WL 300235 (N.D.Ill. Mar. 28, 2001). In the alternative...
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