Plaintiff retained an expert to opine on damages arising from the defendants’ alleged infringement of the asserted patents. The defendants moved to exclude the expert report on two grounds: (1) the expert failed to properly apportion the value of the patented features; and (2) the expert misapplied the market value rule. The expert had attributed 30% of the value of the accused products to the asserted bus interface department.
The district court began its analysis by stating the applicable law: “An expert witness may provide opinion testimony if ‘(a) the expert’s scientific, technical, or other specialized knowledge will help the trier of fact to understand the evidence or to determine a fact in issues; (b) the testimony is based on sufficient fact or data; (c) the testimony is the product of reliable principles and methods; and (d) the expert has reliably applied the principles and methods to the facts of the case.” Fed. R. Evid. 702. A trial court is “charged with a ‘gatekeeping role,’ the objective of which is to ensure that expert testimony admitted into evidence is both reliable and relevant.’ Sundance, Inc. v. DeMonte Fabricating Ltd., 550 f.3D 1356, 1360 (Fed. Cir. 2008).”
Continue reading