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Andrew Sommer is a partner in Winston & Strawn’s Washington, D.C. office. In addition to having first-chair trial experience, Mr. Sommer has almost fifteen years of experience with intellectual property matters, with a specific focus on patent litigation in a broad array of forums including district courts, the International Trade Commission (ITC), the Federal Circuit, and in trials before the Patent Trial and Appeal Board (PTAB). Mr. Sommer has handled all phases of patent litigation, from the filing of a complaint through appeal. He has served as lead trial counsel in federal court litigation, has argued dispositive motions, and argued Markman hearings in both district court and the ITC. He is also a recognized authority and strategist when it comes to counseling clients on the interplay between litigation and trial proceedings before the PTAB. He has been involved in more than three dozen PTAB trials and has represented Patent Owners and Petitioners. He has authored, and regularly updated, two chapters