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Key practice areas
PTAB litigation
Life sciences IP
Intellectual property
ITC litigation
Patent disputes
Trade mark
Patent
Dispute resolution
Federal Circuit
Firm overview

Desmarais LLP is a premier intellectual property litigation firm with approximately 75 attorneys across its New York, San Francisco, and Washington, D.C. offices. The firm has successfully tried and won several of the industry’s most high-profile patent cases in recent years, representing some of the world’s largest companies.

The firm works on complex, often technology-focused disputes, handling every step of the litigation process. The breadth of Desmarais LLP’s work spans a wide range of subjects and technologies, and the firm has obtained successful trial results for clients – both plaintiffs and defendants – in dozens of patent infringement cases and other intellectual property areas.

Litigation

Desmarais LLP handles all patent litigation stages and has significant trial experience in every major forum for technology and life sciences in the United States and elsewhere. The firm has successfully tried cases before judges and juries throughout the U.S., before administrative bodies (including the International Trade Commission and the Patent Trial and Appeal Board), and in front of arbitration panels. Desmarais LLP’s patent infringement successes include winning trials across a host of district courts, preserving both offensive and defensive victories on appeal, obtaining reversals of adverse results, and steering the development of substantive law in clients’ interests in a variety of subject matter areas.

The firm’s patent litigation experience spans numerous industries covering technologies including biotech innovations, chemicals, consumer electronics, medical devices, pharmaceuticals, semiconductors, software, telecommunications, and transportation. The firm’s High-Tech Practice, International Trade Commission Practice, Life Sciences and Medical Device Practice, and Post-Grant Practice also litigate in areas beyond patent disputes, including antitrust, contracts, counterfeiting, fraud, trade dress, trademarks, trade secrets, and unfair competition.

Additionally, the firm’s Pro Bono Practice is committed to serving the community, partnering with organizations such as the SDNY Pro Se Clerk’s Office, the Veterans Consortium, Immigration Equality, and Volunteer Lawyers for the Arts. Each year, Desmarais LLP recognizes attorneys and paralegals who make substantial contributions as part of its Pro Bono Challenge.

Innovative Fee Structures

Desmarais LLP is an industry trailblazer in alternative fee arrangements (AFAs). The firm has abandoned the traditional (and frequently inefficient) billable-hour model in favor of fee arrangements more closely tailored to clients’ interests. This flexible and innovative approach sets it apart from other top-tier firms that litigate similarly large, complex cases.

For clients who prefer predictability, the firm provides flat-fee arrangements negotiated at the outset of the matter, and for those seeking a shared-risk approach, the firm is open to contingent fee arrangements and hybrid structures tailored to the client and the case. Additionally, the firm offers flat-fee billing for expenses. This gives clients clearer budgeting for the duration of the matter (though monthly fees can vary based on the stage of the litigation).

Benefits and Compensation

Desmarais LLP is a leader in benefits and compensation – paying associates salaries that top the New York scale and year-end bonuses for high performers that significantly exceed the market rate. The firm covers 100% of health insurance premiums for all employees and their dependents, meaning attorneys and staff having no monthly costs, except when they receive medical services (e.g., copays). The firm also contributes 4% annually to employees’ 401(k)s – not as a match but as an automatic contribution, even if employees are not paying into their retirement accounts. In addition to short-term disability for birth mothers, Desmarais LLP also provides 12 weeks of paid parental leave for all lawyers and staff, regardless of gender or whether they are adoptive parents.

Diversity

Desmarais LLP is committed to maintaining a workplace that respects all cultures, backgrounds, beliefs, and identities. The firm believes its attorneys’ and staff’s diverse set of experiences play a valuable role in helping achieve creative and effective solutions when dealing with clients’ most challenging cases. The firm’s Diversity Committee promotes an inclusive work environment and focuses on recruiting and retaining lawyers from diverse backgrounds. Desmarais LLP also regularly sponsors student organizations dedicated to promoting diversity and inclusion at law schools and sponsors the annual ChIPs Global Summit dedicated to the advancement of women in technology, law, and policy.

Practice Areas & Sector Specialisations

Sector Expertise

  • Aerospace & defence
  • Biotechnology
  • Computer technology & services
  • Electrical
  • Electronics
  • Entertainment & media
  • Financial services
  • FMCG
  • ICT & software
  • Medical device
  • Pharmaceutical
  • Retail
  • Technology hardware
  • Telecommunication
Address:
230 Park Avenue
New York City
NY 10169
Tel:+1 212-351-3400 Web Address:https://www.desmaraisllp.com
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Overview

Desmarais is one of the country’s leading intellectual property litigation firms. The firm handles complex, often technology-focused patent disputes, overseeing all stages of the litigation process. Desmarais is well known for its strength as a trial firm, many of the firm's lawyers having significant experience seeing cases to verdict. The firm's cases span a wide range of subject matter areas and technologies, and boasts capabilities across fora, including district court, ITC, Federal Circuit and the PTAB.

Notable IP practitioners: John Desmarais, Paul Bondor, Alan Kellman, Leslie Spencer, Justin PD Wilcox, Betty Chen, Peter Magic, Yung-Hoon (Sam) Ha, Tamir Packin, Kerri-Ann Limbeek.

John Desmarais is the founding partner and firm namesake. In addition to his experience in private practice, he also served as Assistant United States Attorney in the Southern District of New York. Yung-Hoon (Sam) Ha leads Desmarais’ post-grant practice before the PTAB. While Betty has two decades of experience successfully representing tech companies.

Testimonials

2026

"Creative trial lawyers, can be cost-effective, highly technical."

"Very experienced. Very bright, creative and thorough."

"Very trial focused. They assume all cases will go to trial, and manage the cases that way, which means strategic decisions are made well in advance and adapted as needed. I also like that they provide opportunities for junior lawyers to have trial experience."

"They are the best IP litigation firm we use. Not only do they have one of the best trial lawyers in the country, their bench is very deep such that every member of the team is excellent at what they do, whether it's managing the case, thinking strategically about how to win, writing, arguing, or otherwise giving us counsel. They have excellent client service with fast response times and thoughtful analyses."

"Top-notch, thoughtful, detailed oriented.  Great strategy partner."

Paul Bondor

"Strong manager of teams, creative, strategic."

David Shaw

"Very detail oriented. A tremendous courtroom presence."

Karim Oussayef

"Karim is extremely well spoken, a strong advocate, involved in the day to day of the case, and generally a pleasure to work with."

Tamir Packin

"He is an exceptionally strategic thinker who manages his teams and our cases with remarkable organization, clear planning, and a strong focus on achieving successful outcomes. He is engaged at both the big-picture and granular levels, consistently attending nearly every call. His hands-on approach not only ensures high standards but also provides invaluable training and mentorship for junior attorneys, helping them develop the skills and discipline needed to excel."

"His strengths are communication, understanding of the business he represents for IBM.  Tamir also has taken the time to fully understand all of the IBM business units which services product areas implicated in litigation which makes him a better attorney representing IBM."

 

2023

"We like their billing model and we value the experience of their team, the thoroughness of the team and the strategic thinking of the team."

Linked Reviews
Patent

A notable recent victory for the firm includes a jury verdict of noninfringement for Apple that eliminated $361 million in patent damages claims. The firm also secured a $44.9 million verdict for IBM.

12 results12 results
Counsel at three firms reveal the tools they’re using to generate patent invalidity claim charts and why they’re making investments in the technology
Betty Chen reveals litigation opportunities and provides an update on plans to double the firm's headcount in San Francisco
Tamir Packin, partner at Desmarais, explains how the team navigated complex discovery issues to secure a patent win for IBM
Read the latest IP practitioner hires and departures in the Americas
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