Antony Pfeffer

Antony Pfeffer

Specialized Practice Lawyer

Email

antony.pfeffer@aoshearman.com

Phone

+1 212 756 1121

Offices

New York

V-CARD
Antony is a seasoned patent litigator and registered Patent Attorney with over 25 years of experience. He has served in partnership roles at leading law firms and as Vice President and General Counsel of a global AI technology company.

Antony is experienced in patent litigation, patent portfolio management, patent opinions, licensing, and commercial contracting in diverse technological areas, including pharmaceuticals, biotechnology, artificial intelligence, software, and electronics. In his role as General Counsel, Antony gained deep experience with global data privacy and emerging global AI regulatory frameworks.

Antony brings a rare combination of litigation leadership, strategic business judgment, and in-house perspective to all of his engagements.

Expertise

Industries

Experience

Representative matters

  • Advising Teva Pharmaceuticals as defense counsel, in district court and on appeal in cases regarding osteoporosis and pain-treatment pharmaceuticals.
  • Advising Toyota as defense counsel  in multiple district court litigations, and as petitioner in twelve inter partes review (IPR) proceedings that ultimately resulted in the cancellation or withdrawal of significant patent claims, and voluntary dismissal with prejudice by the plaintiff.
  • Advising Barnes & Noble as defense counsel in patent infringement suit regarding its NOOK eReader products from claims of patent infringement made by Deep9, and in an ITC investigation instituted by Microsoft.
  • Advising Nitto Denko on a licensing deal with Bristol-Myers Squibb regarding exclusive worldwide rights regarding its novel siRNA molecules to treat liver fibrosis.

Pro bono

  • Scope of Estoppel Post-IPR Proceedings Becoming Clearer, New York Law Journal, March 27, 2017

Speaking Engagements

  • Panelist, The Road Ahead: Key 2025 Federal Circuit Decisions and Cases to Watch in Patent Litigation, NYIPLA, November 5, 2025
  • Panelist, Legal Tech Trends in 2021: Meeting the Challenges of the Modern Workplace, Today’s General Counsel, December 8, 2020
  • Panelist, The Integration of AI and Machine Learning into the Legal Framework, MIP US Patent Forum, April 4, 2019
  • Panelist, Trade Secrets vs. Patents, MIP US Patent Forum 2018, March 13, 2018
  • Panelist, Post-Grant Proceedings as the New Frontline: Impacts and Future Trends of Legislation and Case Law on Licensing and Innovation, LES Annual Meeting, New York,October 27, 2015
  • Panelist, The Changing Landscape of Patent Litigation, 2015 Hispanic National Bar Association Annual Convention, Boston, September 2015
  • Panelist, Which Inventions are Still Protected? Intellectual Property Protection Following the Supreme Court’s Most Recent Decisions, 2015 Hispanic National Bar Association Corporate Counsel Conference, San Antonio, 2015

Leadership Positions And Professional Affiliations

  • Fellow, Leadership Council on Legal Diversity
  • Member, Hispanic National Bar Association

Qualifications

Admissions

Attorney-at-law, State of New York, 1998

Patent Attorney, US Patent and Trademark Office, 1999

Courts

United States Court of Appeals, Federal Circuit

United States District Court for the Southern District of New York

United States District Court for the Eastern District of Michigan

Academic

JD, University of Virginia School of Law, 1997

BS, Nuclear Engineering, with distinction, University of Virginia, 1992

Disclaimer
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.