David Duski

David Duski is a Principal in the Intellectual Property Practice at Charles River Associates.  Throughout his career, David has offered dispute resolution services and expert testimony in various IP matters, including those involving patent infringement, trademark and trade dress infringement, copyright infringement, and trade secret misappropriation.  He has also provided various non-dispute-related IP consulting services to entities including the evaluation of global patent licensing strategies, license compliance reviews, and a portfolio analysis of existing patent license agreements.

David has conducted complex financial analyses involving lost sales, lost profits, incremental profits, manufacturing and marketing capacity, fixed and variable costs, product line profitability, price erosion, reasonable royalties, unjust enrichment, commercial success and pre-judgment and post-verdict interest for both plaintiffs and defendants.  He has also served as an expert witness in matters filed in a US District Court, state court, and before the American Arbitration Association.  In addition, he has lectured on the topic of IP damages at John Marshall Law School, Loyola University Chicago School of Law, the Chicago Bar Association, and the Intellectual Property Law Association of Chicago.

He has been designated a “Recommended” or “Highly Recommended” Expert Witness by the IAM Patent 1000—The World’s Leading Patent Professionals every year since 2019, a leading IP strategist in the IAM Strategy 300 in 2023,  and a Recommended Expert Witness by Who’s Who Legal: IP in 2023.

David received a bachelor’s of science degree in accounting and finance, with high honors, from DePaul University.  He is a Certified Public Accountant licensed in Illinois and Wisconsin, a Certified Licensing Professional, and a Certified Fraud Examiner.