In a recent precedential decision, the U.S. Court of Appeals for the Federal Circuit underscored the importance of specificity in trial expert testimony. The case, NexStep Inc. v. Comcast Cable Communications LLC, involved the vacating of a jury verdict of infringement under the doctrine of equivalents. The court found that the verdict was supported by insufficient evidence, described as “word salad,” highlighting the potential pitfalls for persuasive experts who fail to adequately explain the basis of their opinions at trial.
This ruling serves as a cautionary tale, emphasizing the necessity for experts in intellectual property litigation to provide clear, well-founded explanations to support their conclusions. Attorneys at Barnes & Thornburg note the decision as a prime example of how lacking specificity can shift the trajectory of a case from winning to losing, despite a convincing argument.