Kirk A. Sigmon

Kirk A. Sigmon He/Him/His


Washington, DC

Main: 202.824.3000 Fax: 202.824.3001


Kirk’s work in the U.S. and in Asia, tied with his experience with Fortune 500 companies and startups, provides him the know-how to counsel clients at all stages of invention, patent prosecution, intellectual property enforcement, and litigation.

Kirk began his legal career in Tokyo, and routinely works with U.S., Japanese, Korean, Chinese, and European intellectual property matters.  Kirk’s cases have involved a broad range of technologies, including computer networking, cellular communications, video gaming, virtual reality, machine learning/artificial intelligence, military weapons systems, blockchain technologies, aerospace flight systems, video encoding, petroleum engineering, optoelectronics, data storage, magnetics, agronomy, and toys. Kirk has been certified by the University of Hong Kong as a FinTech professional and is also an IBM-certified Machine Learning Professional, a Google-certified cybersecurity professional, and a Government Blockchain Association-certified Blockchain Legal Specialist. Kirk also speaks Japanese and is actively studying Korean.

One of Managing IP's Rising Stars, Kirk has successfully represented both plaintiffs and defendants in multimillion-dollar patent infringement trials in federal court. He has counseled Fortune 500 companies on topics including patent portfolio management and intellectual property enforcement.

An active member of the business community both in Washington, D.C., and abroad, Kirk has counseled startups and spoken at startup and M&A conferences around the world.  Kirk is also a frequent contributor to the blog Patent Arcade, where he writes on video game intellectual property law.

Before joining Banner Witcoff, in addition to his intellectual property practice, Kirk worked with clients in response to Department of Justice, Consumer Financial Protection Bureau, and Securities and Exchange Commission investigations that involved technical issues such as data security.

Kirk devotes a significant amount of his time to charity and pro bono matters. He has successfully represented a Guantanamo Bay detainee in military proceedings, victims of sexual violence in U-Visa proceedings, and numerous adults and minors in other immigration proceedings. He also routinely prepares testamentary documents for indigent senior citizens.  Outside of the law, Kirk is the head of a charity events organization in Washington, D.C., where he seeks to provide fundraising opportunity to local nonprofits and causes.

  • Wake Forest University
    2010, B.A.
  • Cornell Law School
    2013, J.D.
  • Temple University
    2017, M.B.A.
  • Arizona State University
    2018, B.S., Electrical Engineering


  • Conversational

Bar Admissions

  • 2013, District of Columbia
  • 2013, Virginia

Court Admissions

  • District of Columbia Court of Appeals
  • Superior Court of the District of Columbia
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court for the Eastern District of Virginia

Named to Managing Intellectual Property Rising Stars list, 2021.

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