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Patent Damages Analysis

By Paul A. Ragusa and Jeremy Merling

The determination of damages for patent infringement by way of a reasonable royalty is no simple matter, typically requiring sophisticated expert opinion testimony. Generally, an accounting, licensing, or economics expert will need to consider evidence relating to as many as 15 separate evidentiary factors which are relevant to the reasonable royalty determination, and be asked to reconstruct a hypothetical negotiation between the parties had they willingly negotiated a royalty prior to the commencement of infringement. He or she must properly determine the bounds of such a hypothetical negotiation, and whether the determined royalty rate should be applied to the value of the entire infringing product, or only to a subset of that product.

Given the complexity of the task, patent damages expert opinion testimony is often the subject of a so-called Daubert motion, where a party seeks to exclude a portion or all of a damages expert's proposed testimony as set forth in his or her expert report under Fed. R. Evid. 702 and/or 703. Faced with such a motion, courts undertake the task of considering whether the expert has formed opinions based on reliable methods, and whether the expert has the suitable, relevant expertise to form the opinions at issue. Even if the Daubert hurdle is met, the expert will face a second challenge in presenting his or her opinions to the court or jury in a credible manner. Several practical tips for meeting these challenges are addressed below.

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