Phone: 571.257.4142


Office: Leesburg VA

Hyung Gyu (Leo) Sun is an attorney in the Leesburg office of Dunlap Bennett & Ludwig. Leo’s practice focuses on civil litigation and intellectual property.

Leo has litigated copyright and trademark disputes in a federal district court in the United States, and in opposition and cancellation proceedings before the Trademark Trial and Appeal Board of the U.S. Patent and Trademark Office. Leo advises clients on all aspects of the branding process, including trademark prosecution, licensing, and enforcement.

Prior to joining Dunlap Bennett & Ludwig, Leo worked for a start-up company and an intellectual property law firm in Korea. In addition to his law degree, Leo received a Master’s degree in management of the intellectual property from a Korean educational institution.

  • JD, Syracuse University College of Law, 2017
  • MSL, Northwestern University School of Law, 2014
  • MA (Intellectual Property Management), Korea Advanced Institute of Science and Technology, 2014
  • BA, William & Mary, 2011
  • Virginia
  • U.S. District Court Eastern District of Virginia

Virginia State Bar

Loudoun County Bar Association

Overseas Korean Traders Association, Washington D.C. (Associate Member)

    • Litigation (IP, commercial)
    • Trademark (litigation, prosecution, TTAB)
    • Copyright (litigation, prosecution)
    • Small Business
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