Theresa M. Gillis: Lawyer with Mayer Brown LLP

Theresa M. Gillis

New York,  NY  U.S.A.
Phone212 506 2553

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AV® Preeminent

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Practice Areas

  • Intellectual Property
  • Copyright Litigation
  • Patent Litigation
  • Trade Secrets
  • Trademark Litigation
  • Transactions
  • Trial Proceedings Before the PTAB
  • Life Sciences
Contact InfoTelephone: 212 506 2553
Fax: 212 262 1910
University Emmanuel College, B.A., Chemistry, cum laude, 1971
Law SchoolGeorgetown University Law Center, J.D., 1974
Admitted1975, New York; US Supreme Court; US Court of Appeals for the Second Circuit; US Court of Appeals for the Federal Circuit; US District Court for the Eastern District of New York; US District Court for the Southern District of New York; US District Court for the Western District of New York; US Patent and Trademark Office


Goddard Riverside Community Center, Board of Directors, 2013 - Present

Sanctuary for Families - Recording Secretary, Legal Advisory Council, 2005 - Present

American Bar Association, Past Vice-Chair, IPL Section, Div. VI Appellate Rule and Procedure Committee; Member

American Intellectual Property Law Association, Member

Georgetown University Board of Regents, 2001 - 2007

Georgetown University Law Center Board of Visitors, 2007 - Present

New York City Bar Association, Patent Committee (1981-84; 1992-95); Family Court Committee (2003-06); Member

New York Intellectual Property Law Association, Board of Directors (1996-99); Secretary (2006-07); Treasurer (2007-08); Second Vice President (2008-2009); First Vice President (2009-2010); President Elect (2010-11); President (2011-12)


Terri Gillis is a member of the Intellectual Property practice in Mayer Brown's New York office. She has nearly 40 years of experience in all aspects of intellectual property law.

Terri has both trial and appellate experience, including significant jury trial experience. She has litigated extensively in matters relating to patent infringement, enforceability, misuse and validity, copyright infringement and validity, trademark infringement and dilution, unfair competition, and trade secrets in a variety of courts. She also has substantial experience counseling clients on IP strategy and acquisitions.

Terri has a degree in chemistry. Her practice has included representations in such diverse technologies as pharmaceuticals, medical devices, medical imaging, diagnostic methods, agricultural chemicals, polymers, computer software, digital and film cameras and printers, lead processing and recycling, household appliances, food processing equipment and computers.

Terri has been recognized as a leader in intellectual property organizations. From 2006 to 2013, she was on the Board of the New York Intellectual Property Law Association and was elected President in 2011.

Terri has repeatedly been ranked as a leading individual in Intellectual Property by Chambers USA America's Leading Lawyers for Business and in The Best Lawyers in America.


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Office Information

Theresa M. Gillis

1675 Broadway
New YorkNY 10019-5820


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