Adam Greenfield advises clients across industries on complex patent matters, with a particular focus on litigation and licensing involving electrical and computer technology.

Drawing on his technical background and trial experience, Mr. Greenfield represents domestic and international clients in key patent venues, including US district courts, the US International Trade Commission (ITC), the Patent Trial and Appeal Board (PTAB), and the US Court of Appeals for the Federal Circuit. His clients include many of the world’s top brands, ranging from global financial institutions to leading companies within the automotive, manufacturing, computer networking, and consumer electronics sectors.

Mr. Greenfield regularly handles multifaceted patent matters complicated by antitrust, false advertising, trade secret, or other issues. His representations also frequently involve standard essential patents and fair, reasonable, and nondiscriminatory (FRAND) licensing.

Mr. Greenfield offers clients in-depth knowledge of the patent space, combining a background in electrical engineering and prior experience clerking for Judge Kimberly Moore at the US Court of Appeals for the Federal Circuit. He helps clients achieve favorable resolutions efficiently by conducting early case analysis and avoiding unnecessarily prolonged litigation when possible.

Mr. Greenfield is a member of the Federal Circuit Bar Association, the PTAB Bar Association, and Latham’s Legal Professional & Paralegal Committee. In law school, he served as managing editor of the law review.


Mr. Greenfield has earned broad industry recognition for his practice work. His honors include:

  • Recommended by The Legal 500 US, 2018
  • Named a Federal Circuit Bar Association Global Fellow, 2017-2018
  • Named a Rising Star in Washington, D.C.
    Super Lawyers, 2014-2017

Mr. Greenfield’s representative matters include the following:

  • Swarm Technology, LLC v., Inc. (DAriz; PTAB): Representing Amazon in multi-patent case relating to internet of things (IoT) devices and distributed computing systems. 
  • Longbeam Technologies LLC v., Inc. (DDel): Representing Amazon in multi-patent case relating to location-based encryption and access control technology.
  • Pacific Coast Bldg. Prods., Inc. v. CertainTeed Gypsum, Inc. (FedCir; NDCal; WDArk): Represented CertainTeed in multi-patent cases relating to gypsum and viscoelastic glue products. Invalidated one patent based on indefiniteness, which was affirmed on appeal, and obtained dismissal with prejudice for all other patents.
  • Green Mountain Glass, LLC v. O-I Glass, Inc. (WDTex): Represented O-I in multi-patent case relating to glass container manufacturing processes and ingredients. Settled after claim construction.
  • In the Matter of Certain Thermoplastic-Encapsulated Electric Motors, Components Thereof, and Products and Vehicles Containing Same II (ITC): Represented Honda in multi-patent case filed by Intellectual Ventures. ALJ terminated first investigation for lack of standing. Trial in refiled investigation resulted in initial determination and Commission decision of no violation.
  • Intellectual Ventures I LLC, et al. v. Capital One Financial Corp., et al. (FedCir; DMd): Represented Capital One in multi-patent and antitrust case relating to data security and electronic banking. Obtained early dismissal of one patent and summary judgment that remaining four patents are invalid, which was affirmed on appeal.
  • Vehicle Interface Technologies, LLC v. Jaguar Land Rover North America, LLC (FedCir): Represented Jaguar Land Rover in patent appeal relating to vehicle dashboard technology. Summary judgment of invalidity based on anticipation affirmed.
  • In the Matter of Certain Computing or Graphics Systems, Components Thereof, and Vehicles Containing Same (USITC): Represented NVIDIA in multi-patent case relating to graphics processing. Settled.
  • Federal-Mogul Motorparts Corp. v. Mevotech L.P. (EDMich.; USITC): Represented Mevotech in patent and false advertising cases relating to automotive parts. Settled.
  • Graff/Ross Holdings, LLP v. Federal Home Loan Mortgage Corp. (FedCir; DDC): Represented Freddie Mac in one defensive and two declaratory judgment patent cases relating to electronic bond auctions. Summary judgment invalidating all 616 asserted patent claims affirmed.
  • Intellectual Ventures I LLC, et al. v. HSBC USA Inc., et al. (SDNY): Represented HSBC in multi-patent case relating to financial services. All claims voluntarily dismissed with prejudice.
  • SSL Services, LLC v. Citrix Systems, Inc., et al. (FedCir): Represented SSL in patent appeal relating to VPN technology. Judgment of willful infringement and no invalidity affirmed.
  • Technology Patents LLC v. T-Mobile (UK) Ltd., et al. (FedCir): Represented KPN, Base and E-Plus Mobilfunk in appeal of successful dismissal for lack of personal jurisdiction. Affirmed.

Bar Qualification

  • District of Columbia
  • Illinois
  • US Patent and Trademark Office


  • JD, University of Illinois College of Law
    magna cum laude
  • BS in Electrical Engineering, University of Illinois
    with honors