Durr Systems, Inc. v. EFC Systems, Inc., No. 24-2158 (Fed. Cir. Mar. 20, 2026)

From the Opinion

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Durr Systems, Inc. (“Durr”) sued EFC Systems, Inc. (“EFC”) alleging infringement of claims of U.S. Patent Nos. 6,189,804 (“’804 patent”), 6,360,962 (“’962 patent”), 7,017,835 (“’835 patent”), 8,141,797 (“’797 patent”), and 8,590,813 (“’813 patent”). The district court granted EFC’s motion to exclude the testimony of Durr’s expert , Vincent Dattilo, and its motion for summary judgment of noninfringement. Durr appeals.