Mark D. Selwyn


Co-Chair, Intellectual Property Litigation Practice Group

Selwyn, Mark D.

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.

Honors & Awards

  • Named a leading IP practitioner in the 2016 World Intellectual Property Review (WIPR) guide
  • Named to the Daily Journal's exclusive lists of the Top Intellectual Property Lawyers in California (2008-2015) 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, 2005-2015 editions. Sources say "he is one of the hardest-working practitioners around" and is "top notch."
  • Named a 2013-2015 leading practitioner in patent law by IAM Patent 1000: The World's Leading Patent Practitioners
  • Selected as a 2013-2016 IP Star by Managing IP, a guidebook that identifies leading IP lawyers in the United States
  • Named a "Life Sciences Star" in the 2012-2015 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 2009-2015 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

Publications & News


May 17, 2016

WilmerHale Attorneys and Practices Recognized in 2016 edition of IP Stars Handbook

The fourth edition of the IP Stars Handbook—a Managing IP guide that identifies the leading IP firms and lawyers in the United States—has been released and it prominently ranks WilmerHale and 19 of its partners.

April 7, 2016

Amendments to the Rules of Practice for Trials Before the PTAB Take Effect May 2, 2016

The US Patent and Trademark Office has announced amendments to the Rules of Practice for Trials Before the Patent Trial and Appeal Board that will take effect on May 2, 2016. The amendments generally adopt the rules proposed by the Patent Office on August 20, 2015, but the final rules have several differences of potential importance.

March 21, 2016

Mark Selwyn Joins the California Bar Foundation's Board of Directors

The foundation is comprised of California's top legal minds and influential donors who are dedicated to bettering the California justice system.

March 8, 2016

These Law Firms Crushed it at the Federal Circuit in 2015

Mark Selwyn, co-chair of WilmerHale's IP Litigation Practice, is quoted in a story published by Law360 discussing law firms that had notable success at the Federal Circuit in 2015.

February 12, 2016

WilmerHale Earns Law360 IP Group of the Year Title for the Fifth Year

WilmerHale's Intellectual Property and IP Litigation Practices have been recognized by Law360 as among the 2016 IP Practice Groups of the Year, marking the fifth year that the firm has received this recognition in the past six years.

September 14, 2015

LMG Life Sciences Release 2015 Rankings, Again Names WilmerHale a "Life Cycle Firm"

In its latest edition, LMG Life Sciences recognizes eight WilmerHale practice areas and 16 attorneys, and for the fourth consecutive year names WilmerHale a "Life Cycle Firm."

July 10, 2015

California Bar Foundation Honors WilmerHale With Leading Change Diversity Award

On June 9, the California Bar Foundation announced that WilmerHale along with Intel Corporation and the Equal Justice Society will receive the 2015 Leading Change Diversity Awards.

July 6, 2015

Managing IP Recognizes WilmerHale, Attorneys in 2015 IP Stars Handbook

Managing Intellectual Property has released the third annual edition of its IP Stars Handbook—a guide that identifies the leading IP firms and lawyers in the United States—prominently ranking WilmerHale and 18 of its partners.

June 11, 2015

WilmerHale Featured in National Law Journal's IP Hot List for Fourth Consecutive Year

The firm is one of only 15 chosen for this recognition, which was established to honor those firms that have "accomplished great things in the realm of intellectual property law" in the past year.

June 5, 2015

The Future European Patent System: Update on the Latest News

Following our note “The Future European Patent System: Being Prepared,” we report in the attached document on the very latest news on the implementation of the major changes to the European patent system.

Professional Activities

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


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JD, Columbia Law School, 1993, Harlan Fisk Stone Scholar; Articles Editor, Columbia Journal of Law and Social Problems

AB, magna cum laude, Harvard University, 1990, John Harvard Scholar

Bar Admissions



New York


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