Desmarais LLP

Working efficiently to protect your interests.

Our flexible and innovative approach to fee arrangements sets us apart from other top-tier firms that handle the same types of large, complex litigations. We have abandoned the traditional but inefficient billable-hour approach in favor of fee arrangements more nearly tailored to our clients' interests—freeing us to work efficiently to protect your interests.
Practices
Focused on results.

Desmarais LLP and its lawyers consistently have been recognized in industry publications as leaders in its areas of practice. Whether for jury trial, bench trial, or appellate argument, in whatever jurisdiction, Desmarais LLP's focused approach will bring a lean team of experienced and creative professionals dedicated to achieving your business goals.
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Guarding your most critical business assets.

Our clients include Fortune 100 companies who rely on us to protect their most important intellectual property assets, as well as smaller entities and individuals who seek to enforce the exclusive rights in their inventions or technology.
About
Always prepared to go the distance.

Desmarais LLP focuses on the litigation of complex, often technology-driven disputes.

Our lawyers have successfully tried some of the most important intellectual property disputes in recent times, for some of the largest companies in the world.
ABOUT
At the cutting edge of intellectual property law.

Desmarais LLP lawyers have argued the appeal of numerous cases that have shaped the substantive direction and development of intellectual property law.
Practices
Battle-tested.

Desmarais LLP boasts an unusually deep bench of lawyers with actual, real-world jury trial experience, having successfully tried cases before juries and judges throughout the country, as well as the International Trade Commission.
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OFFICES

New York - P: (212) 351-3400
San Francisco - P: (415) 573-1900
Washington, D.C. - P: (202) 451-4900

John Desmarais Honored As LMG’s Patent Litigator of the Year

LMG Life Sciences named John Desmarais, partner at Desmarais LLP, as its General Patent Litigator of the Year (New York) in the 2025 Americas Awards.

RECENT TRIALS

Desmarais LLP has built one of the most robust and successful IP trial practice groups nationwide.

Recently Desmarais LLP has tried multiple cases, each with a different team of lawyers.

FEATURED PARTNER

Karim Z. Oussayef

Mr. Karim Oussayef is a seasoned first-chair trial counsel with over 15 years of experience litigating high-stakes patent infringement and technology cases. His career is...

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