Dennis J. McMahon

McMahon Dennis

Dennis McMahon is a patent litigator who has worked on several trial teams in federal district courts, representing plaintiffs and defendants in jury and bench trials, before the U.S. International Trade Commission (USITC), and in litigation in the UK, Germany, and the Unified Patent Court (UPC). Dennis counsels on other intellectual property matters, including trademark opinions and prosecution, due diligence, and intellectual property transactions. His technical knowledge includes consumer electronics, such as digital cameras, printers, scanners, image sensors, facial recognition software, user interfaces, and touch screens; fire safety products; and pharmaceuticals and biotechnology products, such as pharmaceutical formulations and polymers.


Representative Clients

  • Canon
  • Genzyme
  • Reliable Automatic Sprinkler
  • Sanofi




  • J.D. magna cum laude Seton Hall University School of Law 2008
    • Order of the Coif
    • Senior editor, Seton Hall Law Review
    • President, Seton Hall Intellectual Property Law Association
  • B.S. Mechanical Engineering Villanova University 2005

Bar Admissions

  • New York
  • New Jersey

Professional Memberships and Activities

  • Member, New York Intellectual Property Lawyers Association, Committee on Patent Litigation


  • Legal 500, Patent Litigation: Full Coverage, 2018


Pro Bono

  • Represented several pro bono clients, which has included assisting nonprofit organizations and artists in securing trademark and copyright protection