In Knorr-Bremse Systeme Fuer Nutzfahrzeuge GMBH v. Dana Corp., Nos. 01-1357, -1376, 02- 1221, -1256 (Fed. Cir. Sept. 13, 2004) (en banc), the Federal Circuit reconsidered its precedent with respect to the interaction between willful infringement and opinions of counsel. In this alert, Kirkland partners Paul R. Steadman and William A. Streff and associate Tiffany Cunningham discuss this ruling and its implications.