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Our Patent Litigation Practice is one of the country’s most active and highly regarded. Our seasoned patent litigators bring extensive courtroom experience to every matter we handle. According to Lex Machina, we are among the top three national patent defense firms in the country for number of appearances and cases filed, and we also were the top national defense firm for number of patent trials in the last five years (2018–2022).
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Winston’s Intellectual Property (IP) Practice is one of the most active and highly regarded in the United States per Chambers USA, Benchmark Litigation US, and Best Law Firms®, among other ranking organizations. Our team features some of the country’s best IP lawyers, attorneys with the technical abilities to litigate and try highly complex IP disputes, and technical lawyers who provide critical advisory services.
Experience 525 results
Experience
|September 9, 2025
Winston & Strawn LLP represented Greenland Exploration Limited in a landmark business combination with Pelican Acquisition Corporation (NASDAQ: PELI) and March GL Company. The transaction, structured as a merger agreement, will result in the formation of Greenland Energy Company, expected to be publicly listed on NASDAQ under the ticker symbol “GLND.” Winston advised Greenland Exploration on all aspects of the deal, including regulatory strategy, corporate structuring, and negotiation of the merger terms.
Experience
|September 8, 2025
Winston represents a class of professional swimmers alleging World Aquatics (WA) violated antitrust laws by blocking their participation in the competing International Swimming League. After WA won summary judgment, Winston successfully appealed, arguing the court applied improper antitrust standards and wrongly denied certification of a damages class. In September 2024, the Ninth Circuit reversed both rulings, reviving all claims and issuing a landmark ruling on the possible application of the per se rule or quick look review to sports-associations rules. Am Law awarded Winston “Litigator of the Week” Runner-Up recognition for the win. In November 2024, the Ninth Circuit denied rehearing. In April 2025, the district court certified a damages class.
Experience
|August 19, 2025
Winston advised Ellipsis U.S. Onshore Holdings LLC, a portfolio company of the Westlawn Group, in connection with the acquisition of high-quality, non-operated working interests in the Permian Basin of Texas and New Mexico—adding approximately 4,000 barrels of oil equivalent per day in net production and over 600 gross remaining drilling locations. This strategic transaction strengthens Ellipsis’ Delaware Basin footprint and supports its strategy of scaling through high-margin, low-cost assets.
Insights & News 8,849 results
Sponsorship
|October 22, 2025
Winston & Strawn Sponsors the 2025 Eastern District of Texas Bench Bar Conference
Winston & Strawn is a proud sponsor of the 2025 Eastern District of Texas Bench Bar Conference, one of the nation’s top annual bench bar conferences. The conference brings together judges, lawyers, topic speakers, guests, and other participants from across the world to discuss a broad range of cutting-edge legal topics.
Sponsorship
|October 19, 2025
Winston & Strawn Sponsors The 2025 National Summit for Middle Market Funds
Winston & Strawn is proud to be an elite sponsor of The 2025 National Summit for Middle Market Funds, the premier event for lower middle market networking and fundraising.
Sponsorship
|October 15, 2025
Winston & Strawn Sponsors ChIPs 2025 Global Summit
Winston & Strawn is a proud sponsor of the 2025 ChIPs Global Summit, which brings together women from all over the world working in technology, policy, private practice, corporations, government, academia, and beyond. Each year, the summit aims to advance innovation through diversity of thought and connect women through engagement opportunities.
Other Results 139 results
Law Glossary
What Is the Patent Trial and Appeal Board?
The Patent Trial and Appeal Board (PTAB) is a tribunal within U.S. Patent and Trademark Office. The PTAB oversees trial proceedings, namely: inter partes review (IPR), post-grant review (PGR), covered business method (CBM) review, and derivation proceedings. The Board also hears appeals from adverse patentability decisions by patent examiners in original applications, reissues, and reexaminations. And, while phasing out since the passage of the America Invents Act (AIA) in 2011, the PTAB is also responsible for deciding interferences. The PTAB was previously referred to as the Board of Patent Appeals and Interferences and was renamed by the AIA.
Site Content
What Is Trademark Infringement?
Trademark infringement is defined as the unauthorized use of a trademark or service mark. This use can be in connection with goods or services and may lead to confusion, deception, or a misunderstanding about the actual company a product or service came from. Trademark owners can take legal action if they believe their marks are being infringed. If infringement of a trademark is proven, a court order can prevent a defendant from using the mark, and the owner may be awarded monetary relief.
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The United States Patent and Trademark Office refers to a trade secret as a type of intellectual property. This definition of trade secret is in reference to the business ownership of a formula, pattern, compilation, program, device, method, technique, or process that provides a competitive edge. As a member of the World Trade Organization, the U.S. government has a responsibility to protect trade secrets. The passage of the Defend Trade Secrets Act of 2016 (DTSA) also increased trade secret protection. Under the DTSA, an individual or organization may be found liable in a civil case for the misappropriation of trade secrets.