Case No. 03cv927 (April 3, 2006). Kenyon & Kenyon LLP client Mattel, Inc. prevailed in a patent infringement lawsuit brought against it by LeapFrog Enterprises, Inc. In the suit, LeapFrog alleged that one of its patents was infringed by the PowerTouch Learning System sold by Mattel's wholly-owned subsidiary, Fisher-Price, Inc. The U.S. District Court in Wilmington, Delaware, found that Mattel and Fisher-Price did not infringe the patent and that the asserted patent claim was invalid. The case, filed in October of 2003, was tried before a jury in May of 2005. The Court made several rulings during trial in favor of Mattel and Fisher-Price, including the exclusion of infringement under the Doctrine of Equivalents and certain damages theories. After seven days of testimony before the Honorable Gregory M. Sleet and three days of deliberation, the jury was unable to reach a unanimous decision and the case was submitted to Judge Sleet for decision.