Partner
C. Gregory Gramenopoulos, an attorney-at law and partner in Finnegan's Washington, D.C. office, has more than two decades of experience in intellectual property (IP) law. He advises emerging and high-technology companies in the software, computer, and artificial intelligence (AI)/machine learning (ML) sectors. An accomplished patent litigator and strategic IP advisor, Greg handles complex, high-stakes patent matters both in and outside of the courtroom.
Recognized by The Legal500 U.S. and Intellectual Asset Management (IAM) Patent 1000, he is the lead author of the acclaimed international treatise, Global Patent Litigation: How and Where to Win, published by Bloomberg Law. He currently serves as co-chair of the Global Series Committee of the Federal Circuit Bar Association (FCBA). Additionally, Greg serves as the vice president and president elect of the National Section of International Federation of Intellectual Property Attorneys for the United States (FICPI-US) and is a member of the U.S. Bar–European Patent Office (EPO) Liaison Council of the American Intellectual Property Association (AIPLA).
Through his knowledge of both U.S. and international patent systems, Greg brings a unique global perspective to advising clients on worldwide filing, licensing, and enforcement strategies. He has successfully represented clients in U.S. district court litigation, Patent Trial and Appeal Board (PTAB) proceedings, and global patent disputes. His experience spans all aspects of patent litigation, including pre-filing investigations, fact and expert discovery, witness depositions, preliminary injunctions, claim construction, summary judgment motions, and pre-trial and trial hearings.
Over the course of his career, Greg has overseen the drafting and prosecution of hundreds of patent applications and has strategically assisted clients in building and managing their portfolios. He has served as lead IP advisor on numerous portfolio transactions, including the historic $1.056 billion patent deal between AOL and Microsoft, and he has guided clients through all deal phases—from strategic planning and negotiations to closing.
A frequent lecturer on U.S. intellectual property law, Greg has spoken before numerous Fortune 500 companies and organizations domestically as well as to various multinational companies and law firms throughout the world.
Finnegan assists AOL in achieving $1.056 billion patent deal
Assisted AOL in achieving a $1.056 billion patent deal with Microsoft, acting as lead IP advisor with respect to strategic planning, negotiations, and closing; the deal involved the sale of 800+ patents and a portfolio license. Led the Finnegan prosecution team that worked closely with AOL to strategically build and strengthen its patent portfolio towards its monetization goals.
Trover Group, Inc. v. Axis Communications
2:13-cv-01047, E.D. Tex., Judges Bryson, Gilstrap
IPR2015-00432, PTAB, Judges Chen, Crumbley, Plenzler
IPR2014-00200, PTAB, Judges Bisk, Boucher, Petravick
RPost Holdings, Inc. v. Swiss Post
2:10-cv-09880, C.D. Cal., Judges Klausner, Gandhi
Represented Moody’s in a trade secret and breach of contract dispute related to its loan pricing software, resulting in a successful settlement and capitulation by the opposing party on all terms.
Compression Vectors LLC v. Axis Communications AB
Lead counsel for petitioner Axis Communications AB in an inter partes review (IPR) petition and in district court related to video compression technology, resulting in settlement.
4:21-cv-00227, E.D. Tex., Judge Jordan
IPR2021-01143, PTAB, Judges Engels, McKone, Stephens
Panel Discussion
Global Patent Strategies & Litigation: An Exclusive Off-the-Record Conversation with Experienced In-House Leaders Global Patent Strategies & Litigation: An Exclusive Off-the-Record Conversation with Experienced In-House Leaders
May 5, 2026
London
Webinar
The Quantum Leap: Patent Strategies for the Next Era of Computing, Communications, and Beyond The Quantum Leap: Patent Strategies for the Next Era of Computing, Communications, and Beyond
March 18, 2026
Webinar
Conference
American Intellectual Property Law Association – Delegation to the United Arab Emirates American Intellectual Property Law Association – Delegation to the United Arab Emirates
February 8-12, 2026
Dubai
"Gramenopoulos is a top strategist and counsellor. He spent five years in the firm’s Brussels office and has built up an impressive roster of European-based clients."
Intellectual Asset Management Patent 1000
“Gramenopoulos excels as a strategic counsellor and licensing negotiator.”
Intellectual Asset Management Patent 1000
“In software, electronics and other high-technology spaces, Gramenopoulos distinguishes himself as a holistic global problem solver: he has prosecuted extensively, built valuable portfolios and advised lucidly on the most challenging infringement scenarios.”
Intellectual Asset Management Patent 1000
“‘Greg is exceptionally well qualified and a consummate professional who stands out for his reasonableness and integrity. It is a privilege to work with him,’ enthused clients.”
Intellectual Asset Management Patent 1000
“Among the best strategic counsellors is…leading light Gregory Gramenopoulos.”
Intellectual Asset Management Patent 1000
“Gramenopoulos also plays on the global stage and serves up perspicacious strategic prosecution and licensing counsel to many European and other high-tech clients…”
Intellectual Asset Management Patent 1000
“Gramenopoulos calls on significant European and international experience and is insightful on global protection matters.”
Intellectual Asset Management Patent 1000
"Gramenopoulos is a top strategist and counsellor. He spent five years in the firm’s Brussels office and has built up an impressive roster of European-based clients."
Intellectual Asset Management Patent 1000
“Gramenopoulos excels as a strategic counsellor and licensing negotiator.”
Intellectual Asset Management Patent 1000
“In software, electronics and other high-technology spaces, Gramenopoulos distinguishes himself as a holistic global problem solver: he has prosecuted extensively, built valuable portfolios and advised lucidly on the most challenging infringement scenarios.”
Intellectual Asset Management Patent 1000
“‘Greg is exceptionally well qualified and a consummate professional who stands out for his reasonableness and integrity. It is a privilege to work with him,’ enthused clients.”
Intellectual Asset Management Patent 1000
“Among the best strategic counsellors is…leading light Gregory Gramenopoulos.”
Intellectual Asset Management Patent 1000
“Gramenopoulos also plays on the global stage and serves up perspicacious strategic prosecution and licensing counsel to many European and other high-tech clients…”
Intellectual Asset Management Patent 1000
“Gramenopoulos calls on significant European and international experience and is insightful on global protection matters.”
Intellectual Asset Management Patent 1000
Award/Ranking
Finnegan Earns Top Rankings in 2026 IAM Patent 1000 Guide; Nearly 60 Attorneys Ranked Finnegan Earns Top Rankings in 2026 IAM Patent 1000 Guide; Nearly 60 Attorneys Ranked
May 28, 2026
Intellectual Asset Management (IAM)Award/Ranking
50 Finnegan Attorneys Ranked in the 2025 IAM Patent 1000 50 Finnegan Attorneys Ranked in the 2025 IAM Patent 1000
June 2, 2025
Intellectual Asset Management (IAM)Commentary
Finnegan Strengthens Its Commitment to the Growing Intellectual Property Market in Latin America Finnegan Strengthens Its Commitment to the Growing Intellectual Property Market in Latin America
January/June 2025
Marcasur InternationalAward/Ranking
46 Finnegan Attorneys Ranked in 2024 IAM Patent 1000 46 Finnegan Attorneys Ranked in 2024 IAM Patent 1000
June 6, 2024
Intellectual Asset Management (IAM)Press Release
Finnegan Receives Top Rankings from Intellectual Asset Management; 46 Attorneys Ranked Finnegan Receives Top Rankings from Intellectual Asset Management; 46 Attorneys Ranked
June 30, 2023
Intellectual Asset Management (IAM)Press Release
45 Finnegan Attorneys Recommended by Intellectual Asset Management; Firm Continues to Be Top Ranked 45 Finnegan Attorneys Recommended by Intellectual Asset Management; Firm Continues to Be Top Ranked
July 8, 2022
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