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.

  • Mark Selwyn Selected Among Finest Law Firm Writers by Burton Awards

    Selwyn was selected based on his article, "Design Patent Post-Grant: Is Anticipation Easier to Prove Than Obviousness?," published by Bloomberg BNA's Patent Trademark & Copyright Journal.

    March 23, 2017
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  • Mark Selwyn Recognized Among Nation's Best for Intellectual Property

    Chambers USA announced its rankings for the 2018 edition and named Partner Mark Selwyn as a leader in his field.

    May 3, 2018
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  • WilmerHale Named IP Litigation Powerhouse by BTI Consulting 

    The BTI Litigation Outlook 2019 has identified WilmerHale as an IP Litigation Powerhouse—a stand out firm according to general counsel for “the ability to deliver top-shelf results in IP matters.”

    October 18, 2018
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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

  • Recognized among "the finest law firm writers" of 2017 by the Burton Awards
  • Selected by his peers for inclusion in the 2017–2019 editions of the Best Lawyers in America
  • Named a leading IP practitioner in the 2016–2018 World Intellectual Property Review (WIPR) guides
  • Named to the Daily Journal's exclusive lists of the Top Intellectual Property Lawyers in California (2008–2016, 2019) and Top 100 Lawyers in California list (2013)
  • Recognized for exceptional standing in the legal community in the area of intellectual property in Chambers USA: America's Leading Lawyers for Business, 2005–2019 editions. Sources say "He is substantively excellent. He knows the law and is fantastic at all levels—from trial to appeal."
  • Named a 2013–2018 leading practitioner for patent litigation by IAM Patent 1000: The World's Leading Patent Practitioners
  • Selected as a 2013–2019 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 2012–2018 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 2009–2018 editions of Northern California Super Lawyers for his intellectual property litigation practice
  • Named a "Local Litigation Star" and a "California Litigation Star" for Intellectual Property in the 2012 and 2013 editions of Benchmark Litigation
  • 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