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Louis Tompros

Lecturer on Law

Fall 2023

Louis Tompros
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Louis Tompros is an experienced first-chair trial and appellate litigator. He makes the fast-moving and legally complicated field of intellectual property understandable for juries and judges. He has handled the most challenging patent, trademark, copyright, publicity, and defamation matters at trial and on appeal, for high profile clients in technology, entertainment, artificial intelligence, and alternative energy, and he has been hailed as a “prizefighter” in the world of intellectual property litigation. He has successfully tried multiple intellectual property cases to verdict as lead trial counsel, has successfully argued multiple appeals before the Federal Circuit, and teaches patent trial advocacy at Harvard.

In the patent space, Mr. Tompros has handled cases involving smartphones, semiconductors, alternative energy, powersports vehicles, DNA testing, power conversion, data encryption, video compression and plastic storage devices. In 2022, he was lead trial counsel for a defendant in a case resulting the invalidation of a competitor’s asserted patent, and in 2021, he successfully argued a summary judgment motion resulting in the elimination of more than $5 billion of a patent plaintiff’s damages claim. He has likewise prevailed in multiple inter partes review and reexamination proceedings before the Patent Trial and Appeal Board.

Among Mr. Tompros’s first-chair trial successes in his representation of Bombardier Recreational Products, in which a federal jury returned a full defense verdict rejecting a $130 million trademark infringement claim brought by Jaguar Land Rover over its “Defender” trademark. Land Rover had previously won a similar case against BRP in the European Union, making this US jury trial win particularly significant, and earning Mr. Tompros the title of “Litigator of the Week” from The American Lawyer. In 2021, he secured a high-profile victory for recording artist Elizabeth Chan over singer Mariah Carey, in which the Trademark Trial and Appeal Board permanently rejected Carey’s attempt to register the trademark “Queen of Christmas.”  The win resulted in widespread industry and media praise, including coverage in the New York Times, the Wall Street Journal, Variety, and People. In addition, Mr. Tompros has handled complex and controversial trademark matters implicating questions of free speech in federal courts nationwide.

Mr. Tompros also represents visual and conceptual artists, filmmakers, agencies, video game publishers, authors and celebrities in copyright infringement, publicity, and defamation actions, including the creator of the famous “Pepe the Frog” comic book character in enforcement efforts to reclaim the character from “alt-right” entities. His successful copyright enforcement action against Alex Jones’s Infowars media platform was named one of the top copyright rulings of the year by Law360, and is the subject of the Emmy-winning and Sundance prize-winning documentary Feels Good Man. He has also represented clients in defamation, trade dress, unfair competition, trade secret and design patent matters in courts throughout the country, and is frequently cited as an authority in the application of intellectual property law to evolving internet phenomena, including artificial intelligence, memes, deepfakes and NFTs. 

As an appellate lawyer, Mr. Tompros regularly appears before the United States Court of Appeals. His Federal Circuit advocacy as lead counsel in (among other cases) Arctic Cat Inc. v. Bombardier Recreational Products Inc., In re Klein, and In re Packard has shaped the patent law. The Klein case, for example, resulted the Patent Office issuing a public agency-wide memo instructing all patent examiners on new rules for patent examination.

Pro bono representation is also an important part of Mr. Tompros’s practice. He represents civil rights icon James Meredith in a complex trademark dispute with the University of Mississippi, and previously represented Save the Children in its trademark enforcement activity against members of the “QAnon” movement. He has represented artists, authors, and a prominent literary journal on a pro bono basis in copyright and intellectual property contract matters, including representations through the Volunteer Lawyers for the Arts. He has represented terminated employees in unemployment insurance claims and appeals, public housing tenants facing eviction, and public advocacy groups submitting amicus briefs on criminal defense and privacy issues. In one of his early cases, Mr. Tompros represented a group of gay and lesbian service members challenging the constitutionality of the military’s “Don’t Ask, Don’t Tell” policy, in association with the Servicemembers Legal Defense Network.

While attending Harvard Law School, Mr. Tompros was Supreme Court Chair of the Harvard Law Review and a member of the winning team in the Ames Moot Court Competition.


  • B.A. English Yale University, 2000
  • J.D. Law Harvard Law School, 2003

Academic Appointment and Employment History

  • Partner, WilmerHale (2012 - Present)
    Boston, Massachusetts
  • Counsel, WilmerHale (2010 - 2011)
    Boston, Massachusetts
  • Senior Associate, WilmerHale (2009 - 2009)
    Boston, Massachusetts
  • Associate, WilmerHale (2004 - 2008)
    Boston, Massachusetts

Bar Admissions

  • Supreme Judicial Court, Massachusetts (2003)


  • Hon. Richard Linn, United States Court of Appeals for the Federal Circuit, 2008 - 2009
  • Hon. Robert J. Cordy, Massachusetts Supreme Judicial Court, 2003 - 2004

Board Memberships

  • Chair, Leadership Council of the WilmerHale Legal Services Center of Harvard Law School (2020 - Present)
    Boston, Massachusetts
  • Chair, Equal Justice Coalition (2016 - Present)
    Boston, Massachusetts
  • Trustee, The Learning Project Elementary School (2017 - Present)
    Boston, Massachusetts, United States

Honors and Awards

  • Boston Magazine's Top Lawyers (Civil Law Litigation) (Awards)
    December 2023
  • Best Lawyers in America (Professional Honors)
    January 2023
  • Boston Magazine's Top Lawyers (Awards)
    December 2022
  • National Law Journal Plaintiffs' Lawyers Trailblazer (Professional Honors)
    May 2020
  • The American Lawyer's Litigator of the Week (Professional Honors), January 2019
  • National Law Journal Rising Star (Professional Honors)
    November 2015
  • Law360 Rising Star in Intellectual Property (Professional Honors)
    May 2014
  • Massachusetts Up and Coming Lawyer (Professional Honors)
    May 2012