Mark D. Selwyn


Mark D. Selwyn


  • Co-Chair, Intellectual Property Litigation Practice Group

Mark Selwyn is a partner in the Litigation/Controversy Department, co-chair of the Intellectual Property Litigation Practice Group and a member of the firm's Management Committee. He joined the firm in 1994.

Mr. Selwyn’s practice focuses on intellectual property litigation. Major corporations have relied on him to litigate biomedical, electrical, chemical, mechanical, and business method patents involving a diverse array of technologies, including wireless communications, electronic commerce, digital cameras, solid state disk drives, location sensing, biosensors, water and wastewater filtration, integrated circuits and angioplasty catheters. He has represented clients in dozens of patent and other intellectual property cases in federal courts throughout the country and before the International Trade Commission (ITC). Mr. Selwyn counts among his clients many of Silicon Valley’s most prominent technology companies.

Mr. Selwyn is a member of the California Bar Foundation's Board of Directors.

  • Chambers USA Recognizes Mark Selwyn Among Nation's Best for Intellectual Property

    Chambers USA announced its rankings for the 2021 edition and named Partner Mark Selwyn as a leader in his field.

    May 20, 2021
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  • Mark Selwyn Among Daily Journal’s 2019 “Top Intellectual Property Lawyers”

    Palo Alto-based Mark Selwyn, co-chair of the firm’s IP Litigation Practice, has been named by the Daily Journal as one of its Top Intellectual Property Lawyers for the 10th year. This exclusive list honors California lawyers who have achieved exceptional accomplishments in the field.

    May 9, 2019
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  • Mark Selwyn Recognized as a California Trailblazer by The Recorder

    Mark Selwyn has been named as a 2019 California Trailblazer by The Recorder. The honor recognizes professionals who have made “significant marks on the practice, policy and technological advancement of their practice.”

    July 15, 2019
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  • Award Text

    Recognized as an IP Star

    Managing IP


  • Award Text

    Leading Lawyer for Intellectual Property

    Chambers USA


  • Award Text

    Top Intellectual Property Lawyer in California

    Daily Journal

    2008-2016, 2019-2021

  • Recognized as a West Trailblazer by The American Lawyer for its inaugural edition in 2021
  • Named a 2019 California Trailblazer by The Recorder, an honor recognizing professionals who have made “significant marks on the practice, policy and technological advancement of their practice”
  • Recognized among "the finest law firm writers" of 2017 by the Burton Awards
  • Selected by his peers for inclusion in the 2017–2021 editions of the Best Lawyers in America
  • Named a leading IP practitioner in the 2016–2020 World Intellectual Property Review (WIPR) guides
  • Named to the Daily Journal's exclusive lists of the Top Intellectual Property Lawyers in California (2008–2016 and 2019–2021) and Top 100 Lawyers in California list (2013)
  • Named a "Local Litigation Star" and a "California Litigation Star" for Intellectual Property in the 2022, 2021, 2013 and 2012 editions of Benchmark Litigation and a "National Practice Area Star" in the 2021 and 2022 edition of Benchmark Litigation
  • Recognized for exceptional standing in the legal community in the area of intellectual property in Chambers USA: America's Leading Lawyers for Business, 2005–2021 editions. Sources say "He is substantively excellent. He knows the law and is fantastic at all levels—from trial to appeal."
  • Named a 2013–2021 leading practitioner for patent litigation by IAM Patent 1000: The World's Leading Patent Practitioners
  • Selected as a 2013–2020 IP Star by Managing IP, a guidebook that identifies leading IP lawyers in the United States
  • Recommended by The Legal 500 United States for his work in patent litigation at the International Trade Commission
  • Named a Life Sciences Star in the 2012–2021 editions of LMG Life Sciences for intellectual property
  • Named as one of the "Top 100 Attorneys in Northern California" in 2011 and 2015 by Super Lawyers magazine
  • Recognized in the 2009–2021 editions of Northern California Super Lawyers for his intellectual property litigation practice
  • Selected as one of Lawdragon Magazine's "500 Leading Lawyers in America" in 2013
  • Recognized as a "Massachusetts Super Lawyers Rising Star" in intellectual property litigation in the May 2005 edition of Boston Magazine

Insights & News


  • Education

    • JD, Columbia Law School, 1993

      Harlan Fisk Stone Scholar; Articles Editor, Columbia Journal of Law and Social Problems
    • AB, Harvard University, 1990

      magna cum laude John Harvard Scholar
  • Admissions

    • California

    • Massachusetts

    • New York

  • Clerkships

    • The Hon. Naomi Reice Buchwald, US District Court for the Southern District of New York, 1993 - 1994