Patent Litigation

Many of the world’s premier companies rely on Weil’s patent litigation expertise to navigate the ever-changing patent landscape. Our lawyers are at the forefront of major representations that are transforming the technology and life sciences industries.

Notable Representations, Key Contacts

Patent Litigation Infographic

Our litigators have a great track record in patent cases across all the major venues in the United States. We effectively advance our clients’ objectives, whether those are winning a dispute in court or negotiating an advantageous license. Our team provides clients with experience across multiple sectors, including semiconductors, high tech, telecom, pharmaceutical and biotechnology therapeutics, biotechnology research tools, medical devices, chemicals, manufacturing, and consumer products.

Integrated, Full-Service Patent Dispute Practice

Attorneys in the Patent Litigation group have extensive experience litigating and trying cases in all the major patent venues. We understand the landscape in each court and tribunal; this deep knowledge gives our clients a strategic advantage in high-stakes proceedings. Our patent litigators regularly represent clients in:

  • U.S. District Courts: Our litigators have extensive experience, and have achieved significant wins, in the District of Delaware, the Eastern District of Texas, the Northern and Central Districts of California, the Eastern District of Virginia, the District of New Jersey, and others.
  • Federal Circuit Court of Appeals: Clients rely on Weil’s patent appeals practice for its experience, acumen, and ability to deliver win after win in the Federal Circuit.
  • U.S. International Trade Commission: Our lawyers regularly represent clients in high-stakes investigations under the ITC’s fast-paced procedures.
  • Patent Trial and Appeal Board: We regularly work with clients on challenges to the validity of patents at the PTAB, in Inter Partes Review (IPR), Post-Grant Review, and Covered Business Method Review proceedings, both as Patent Owners and Petitioners.
  • IP Due Diligence: We offer a multidisciplinary Strategic IP Counseling group that focuses on patent portfolio analysis, pre-dispute counseling and investigations, and IP transactions.

The Team’s Technical Depth

Recognized as a go-to firm for high-stakes patent litigation, we offer a deep bench of litigators with diverse technical and scientific backgrounds, including graduate and undergraduate degrees in: electrical engineering, physics, mechanical engineering, computer science, chemistry, biochemistry, molecular biology, and cell biology.

“Weil has an enduring reputation for excellence in high-exposure patent litigation between competitors, whose results transform fortunes and impact on entire industries.”

IAM Patent 1000

Selected Representations

Bio-Rad Laboratories and the University of Chicago

HP Inc.




General Electric

Key Contacts

Anish Desai

Anish Desai


New York

Edward R. Reines

Edward R. Reines


Silicon Valley

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Recent Announcements

Ranked among the leading firms for Intellectual Property in California, New York and Nationwide

Chambers USA 2024

Ranked among the leading firms nationally for Patents: Litigation.

Legal 500 US 2024

Weil is ranked as a national Tier 1 firm for Intellectual Property

Benchmark Litigation, 2024

Weil’s team “'fights aggressively, but reasonably” and “stands out through its combination of in-depth technology and life sciences sector knowledge and comprehensive patent disputes offering, with the strong district court experience and PTAB practice … combining well with the team's Federal Circuit and ITC investigations skills.”

Legal 500 US

Clients say Weil is “a go-to firm with effective execution and efficient work” and has “extraordinary lawyers producing top-notch work product" who are “smart, hard-working and meticulous” and “able to work at a high level on strategy and are always thinking five steps ahead," further noting “they’re superb in their client service and are an incredibly organized team. They’re on top of the large matters and they make sure the trains run on time,” and offer “great breadth and depth, but are also very practical.”

Chambers USA

Ranked among the leading firms nationally for Patent Contentious and PTAB Litigation.

Managing Intellectual Property 2022

Ranked among the leading firms nationally for Patent Litigation, as well as in California, New York, Texas and Washington, D.C.

IAM Patent 1000 2023

Ranked among the leading firms in the U.S. for Intellectual Property: Patent.

Chambers Global 2022

When it comes to patent litigation and transactions Weil is a top national player. Whether handling challenging patent disputes, technology transfers, or licensing arrangements, the ensemble acquits itself with distinction and attracts top companies in the life sciences and tech industries.”

IAM Patent 1000, 2023

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