Dennis J. McMahon

McMahon Dennis
Dennis McMahon is a patent litigator who has been a member of several trial teams in various federal district courts, representing plaintiffs and defendants in jury and bench trials, and before the U.S. International Trade Commission. Dennis also counsels on a spectrum other intellectual property matters, including trademark opinion work and prosecution, due diligence, and intellectual property transactions. His technical knowledge spans a variety of technologies, including consumer electronics, such as digital cameras, printers, scanners, image sensors, facial recognition software, user interfaces, and touch screen technology; 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