Gregory H. Lantier


Gregory H. Lantier


  • Co-Chair, Post-Grant Proceedings Group

Greg Lantier is a trial lawyer and appellate advocate who focuses on disputes involving intellectual property, including patent, copyright, and trade secret infringement as well as IP ownership and licensing lawsuits. Mr. Lantier also advises clients regarding intellectual property strategy and licensing and assists clients in connection with legislative and executive actions affecting intellectual property interests.

Mr. Lantier has served as lead counsel for clients from a broad range of industries in matters before the US Supreme Court, US Circuit Courts of Appeal, US district courts, state courts, the US Court of Federal Claims, and the US International Trade Commission. He has argued post-grant proceedings before the Patent Trial and Appeal Board pro hac vice. Additionally, Mr. Lantier has experience working with foreign counsel at the trial and appellate stages of intellectual property-related litigation occurring outside the United States.

Mr. Lantier has successfully litigated the largest "bet-the-company" matters, helping to lead teams of dozens of attorneys to trial. He also has had substantial success handling smaller matters with streamlined case teams to efficiently obtain results. Mr. Lantier has served clients in the computer software, medical device, financial services, telecommunications, defense, semiconductor, pharmaceutical, biotechnology and other industries.

Mr. Lantier co-chairs the firm's Western District of Texas Working Group and its Post-Grant Proceedings Practice Group. He is also a member of the firm's FinTech interdisciplinary group.

Professional Activities

Mr. Lantier is an adjunct professor at American University, Washington College of Law, where he has taught a course on patent litigation.

He is admitted to practice before the US Court of Federal Claims and the US Court of Appeals for the Federal Circuit, Fourth Circuit and Ninth Circuit, and the US District Courts for the Eastern District of Virginia, the Northern District of New York, the Western District of New York, the Southern District of New York, the Eastern District of Virginia and the District of Columbia.

Mr. Lantier is a member of the American Bar Association, the Virginia State Bar Association, the New York State Bar Association and the Federal Circuit Bar Association.

  • Partner Gregory Lantier Named Law360 Intellectual Property Rising Star

    Gregory Lantier, Washington-based partner and co-chair of WilmerHale’s Post-Grant Patent Proceedings Group, has been named among Law360’s 2018 Rising Stars in intellectual property.

    August 24, 2018
    Read More


  • US Supreme Court

    • Represented petitioner in PNC Bank v. Secure Axcess, 138 S.Ct. 1982 (2018) (vacating court of appeals).
    • Represented respondent in Bowman v. Monsanto 133 S.Ct. 1761 (2013) (affirming court of appeals).
    • Represented respondent in Stanford v. Roche. 563 US__, 131 S.Ct. 2188 (affirming court of appeals).
  • US Court of Appeals for the Federal Circuit

    • Successfully argued two appeals on behalf of insurance company clients in patent infringement actions brought by Intellectual Ventures. Between the two appeals, the Federal Circuit affirmed the district court's findings that three Intellectual Ventures' patents are invalid under 35 U.S.C. 101, and that Intellectual Ventures did not own a fourth patent.
    • Successfully argued for affirmance of district court's order dismissing 243 claims as reciting ineligible subject matter under 35 U.S.C. § 101.
    • On behalf of a software client, obtained complete reversal of a district court's holding that four patents are invalid under 35 U.S.C. § 101.  
    • Argued on behalf of the appellee in favor of the trial court's award of attorney fees and costs in a patent infringement action. The Federal Circuit granted summary affirmance.
  • US District Courts

    • Obtained dismissal of a seven patent infringement complaint because all claimed patent ineligible subject matter under 35 U.S.C. § 101.
    • Successfully argued for dismissal of patent infringement complaints filed by Intellectual Ventures on behalf of insurance company clients. 
    • Represented medical device manufacturer asserting infringement of patents relating to methods and devices for performing spinal surgery. The jury found the asserted patents infringed and not invalid.
    • Represented financial institution sued for infringement of patents relating to data compression and decompression. The court granted motions for summary judgment of invalidity and no infringement.
  • US Court of Federal Claims

    • Successfully argued for summary judgment of no patent infringement on behalf of supplier of mail sorting machines to the United States Postal Service.
  • State Courts

    • Represented biotechnology client in patent ownership and trade secrets dispute, resulting in favorable judgment after a trial.
    • Represented major computer technology client in license dispute with a graphics technology company, resulting in settlement.
  • US International Trade Commission

    • Represented respondent, a leading computer, mobile device and media player company, in a Section 337 investigation involving five patents at trial before the International Trade Commission. Initial Determination of no violation was issued. (ITC Inv. No. 337-TA-794).
    • Represented flash memory manufacturer accused of infringing patents in two successive Section 337 investigations at trial before the International Trade Commission. The ITC made a Final Determination of no violation in both investigations. (ITC Inv. Nos. 337-TA-526, 337-TA-560).
  • Patent Trial and Appeal Board

    • Appearing pro hac vice, successfully presented oral argument in trial of covered business method review proceeding on behalf of two large financial services firms.


  • Honored by Managing IP with a 2019 Impact Case of the Year Award for his work in the US Supreme Court case PNC Bank National Association v Secure Axcess
  • Named a "Litigation Star" for intellectual property by Benchmark Litigation in 2017 and 2020
  • Included in BTI Consulting's Client Service All-Stars 2020 and 2016 lists for combining "exceptional legal expertise with practical advice, business savvy and innovative, effective solutions"
  • Honored as a 2018 and 2015 Intellectual Property Rising Star by Law360
  • Named among the Washington DC Super Lawyers in 2020–2021 and as a "Rising Star" in 2015–2018

Insights & News


  • Education

    • JD, Harvard Law School, 2003

      cum laude
    • BA, Journalism and English, The George Washington University, 2000

      summa cum laude Phi Beta Kappa
  • Admissions

    • District of Columbia

    • Virginia

    • New York

    • US Supreme Court

  • Clerkships

    • The Hon. Rebecca Beach Smith, US District Court for the Eastern District of Virginia, 2003 - 2004