Mary Mazzello is an intellectual property litigation partner in Kirkland’s New York office. Her practice focuses on trademark, copyright, trade secret, and music royalty matters. Mary has litigated cases across a wide range of venues, including trademark disputes before the Trademark Trial and Appeal Board, music copyright matters before the Copyright Royalty Board, IP disputes in state and federal courts, and appellate issues before the United States Supreme Court. Mary also advises clients on pre-litigation issues, branding matters, new product launches, and IP acquisition and licensing issues. In addition, Mary has extensive experience with trademark clearance, registration, and maintenance for clients across a variety of industries, including sports, health, financial services, consulting, real estate, fashion, and technology.

Mary frequently lectures on IP-related issues. She also maintains an active pro bono practice, including representing veterans in claims before the Department of Veterans Affairs. Mary has been a firm mentor since 2014 and was the 2022 Summer Associate Program Committee Liaison for the New York Copyright, Trademark, Internet, and Advertising group.


Thought Leadership


  • “Trade Secrets: Keep it Simple, Keep it Safe,” ABA-IPL Section Annual Meeting, 2024
  • “Keeping Secrets: How To and How Not to Protect Your Company's Trade Secrets,” Trademark, Internet, & Advertising Symposium, 2023
  • “Staying in Tune: Recent Developments in Music Copyright Law,” Trademark, Internet, & Advertising Symposium, 2023
  • “Hot Topics in IP,” ChIPs Annual Meeting, 2021
  • “Year in Review: Trademark, Trade Secret, Patent, Copyright, Design Rights,” Copyright Presenter, American Intellectual Property Law Association, Webinar, 2021
  • “The Year In Review, U.S. Copyright Law 2020,” American Intellectual Property Law Association Annual Meeting, 2020
  • “Join the Issues: Trademark Law 2020,” Webinar, 2020
  • “Trademark, Copyright, and Industrial Design: Case Law Update,” IPO Annual Meeting, 2019
  • “It's Not the Principle, It's the Money,” Copyright, Trademark, Internet, & Advertising Symposium, 2019
  • “IP Issues in the Deal Context,” Copyright, Trademark, Internet, & Advertising Symposium, 2019
  • “Using Social Media and Internet-Based Content: What You Don't Know Can Hurt You!” 23rd Annual Technology & Law Seminar, 2016

Articles, Publications & Press Mentions

  • Quoted, “Copyright Cases to Watch in 2022,” Law360, January 3, 2022
  • Quoted, “The Biggest Copyright Rulings of 2021,” Law360, December 14, 2021
  • Quoted, “Foreign Sales Trademark Case ‘Ripe for SCOTUS Appeal’ to Fix Split,” Managing IP, September 6, 2021
  • Quoted, “Rallying the Troops May Help Thwart Trademark Squatters,” Managing IP, April 17, 2020
  • Author, “Hot Topics in U.S. Copyright Law 2020,” International Trademark Association, 2020
  • Author, “The Year in Review, U.S. Copyright Law 2020,” American Intellectual Property Law Association, 2020


Recognized by The Legal 500 United States: Trademarks: Litigation, Media and Entertainment, 2018–2023

Recognized as a “Rising Star” in Super Lawyers Magazine, 2017–2019

Memberships & Affiliations

ChIPs, 2022–Present

New York City Bar Association, Committee on Trade Secrets, 2019–2020


Admissions & Qualifications

  • 2012New York


  • Supreme Court of the United States
  • United States Court of Appeals for the Second Circuit
  • United States Court of Appeals for the Ninth Circuit
  • United States District Court for the Southern District of New York


  • Harvard Law SchoolJ.D.cum laude2011
    Submissions Committee, Sports & Entertainment Law Journal
  • Washington University in St. LouisB.A., Economicswith Honors2003
    Omicron Delta Kappa Award for the Performing Arts