Adduci, Mastriani & Schaumberg LLP

Sarah E. Hamblin

Sarah E. Hamblin
t: 202-467-6300
f: 202-466-2006
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  • Virginia State Bar
  • ITC Trial Lawyers Association (President, 2015-2016; Executive Committee, 2006-present)
  • Intellectual Property Owners Association (Vice Chair, ITC Committee, 2012-present)


  • The Catholic University of America, Columbus School of Law, J.D.
  • Mary Washington College (now University of Mary Washington), B.S.


  • French


  • Virginia
  • District of Columbia
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court, Eastern District of Virginia
  • Registered to practice before the U.S. Patent and Trademark Office

Sarah E. Hamblin is an intellectual property and international trade attorney focusing on unfair trade investigations before the U.S. International Trade Commission (ITC) under Section 337 of the Tariff Act of 1930, as well as litigation in the federal courts. Sarah has represented both domestic and foreign parties in more than 30 investigations, addressing all phases of Section 337 litigation, including appeals before the Federal Circuit. Sarah was a leader of Respondents’ domestic industry team in the matter of Certain Multimedia Display and Navigation Devices and Systems (Inv. No. 337-TA-694), in which the Commission's determination finding no violation based a lack of domestic industry, defined the current framework for evaluation a potential licensing domestic industry.

Sarah is a contributor to the first, second, and third editions of the American Bar Association's book entitled "A Lawyer's Guide to Section 337 Investigations Before the U.S. International Trade Commission."

While in law school, Sarah worked at the ITC, where she completed an extended clerkship in the Office of Unfair Import Investigations, followed by an internship in the Office of the Administrative Law Judges with the honorable Sidney Harris. Prior to attending law school, she worked for several years as a research scientist and as a quality control scientist at a Maryland biotech company.

Adduci, Mastriani & Schaumberg, L.L.P. is a Washington D.C. law firm and internationally recognized leader in the field of international trade law with an emphasis on Section 337 intellectual property litigation before the United States International Trade Commission (ITC).  Founded in 1981, the firm has over 30 years of experience practicing before the ITC, all other federal agencies involved in international trade, the United States Court of International Trade, and federal district and appellate courts.  As part of its Section 337 practice, the firm has participated in approximately one-third of all investigations instituted in the last ten years.  In other areas of international trade law, the firm represents clients in antidumping and countervailing duty proceedings, as well as advises clients on Customs valuation and classification, and on country of origin, duty preference programs, sanctions, and export control issues. The firm also advises clients on trade policy issues, including import and export opportunities and barriers, enforcement, and regulatory hurdles.  In addition to its international trade practice, the firm represents clients in a broad range of intellectual property disputes and counsels them on licensing and enforcement.

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