Winston & Strawn LLP

Winston & Strawn LLP has built a reputation as a trial lawyers’ firm. Our litigators are some of the most seasoned in the industry, bringing extensive courtroom experience to every matter our firm handles. Moreover, our long history of taking cases to trial – and winning – gives our clients tremendous settlement leverage with their adversaries, as well as confidence in a successful outcome if and when they go to trial. More than 25 of our attorneys have first-chaired multiple patent trials, and in the past five years we have taken 49 patent cases to trial (Lex Machina).

National recognition

With nearly 130 attorneys, Winston’s patent litigation practice is one of the most active and highly regarded in the country. Most recently, Winston was recognised as US Patent Ligation Firm of the Year 2020 by IAM and WTR's Global IP Awards. Winston has also been recognised for its excellence in IP litigation (United States – Tier 1) by Benchmark Litigation. Our IP litigation practice has been ranked in the first tier nationally by US News & World Report in its Best Law Firms survey, and both Chambers USA and The Legal 500 selected our IP practice for national rankings.

US district court litigation

Winston patent litigators regularly appear in all of the leading patent jurisdictions. Over the past five years (2016-2020), our attorneys have handled more than 500 patent cases in 30 district courts, including:

  • 104 cases in the District of Delaware;
  • 66 cases in the Eastern District of Texas;
  • 35 cases in the Western District of Texas;
  • 49 cases in the District of New Jersey;
  • 41 cases in the California courts; and
  • more than 50 cases in other key jurisdictions, including the Northern District of Illinois, the Eastern District of Virginia, the Southern District of New York and the Southern and Northern Districts of Texas.

ITC litigation

Winston has substantial experience litigating high-stakes patent infringement cases before the International Trade Commission (ITC). The firm’s experienced team comprises a number of attorneys who have first-chaired successful ITC trials, as well as a former ITC senior investigative attorney and former US patent examiners. Our attorneys have the education and industry experience to immediately understand complex technology, a working knowledge of the specialised procedural law and the substantive experience to formulate and execute the strategies necessary to succeed at the ITC.

PTAB trials

Winston is ideally positioned for litigation before the PTAB in proceedings such as inter partes reviews, covered business method patent reviews and post-grant reviews. Winston has significant experience litigating these proceedings successfully. Winston attorneys have appeared in more than 100 PTAB matters and tried several of the first cases to reach hearing.

Patent prosecution

Winston has an active patent prosecution practice that assists clients with the prosecution, development, maintenance and licensing of patent portfolios worldwide. Our patent prosecution attorneys typically file 100 to 150 US patent applications and obtain approximately 70 to 80 US patents annually. The firm’s scientifically trained attorneys and patent agents are experienced in the preparation and worldwide prosecution of patent applications pertaining to the traditional sciences, as well as in new and developing technologies. Many of our patent attorneys have technical degrees in fields such as electrical engineering, computer science, physics, chemical engineering, chemistry, materials engineering and metallurgy.


Additional statistics about our patent practice include the following:

  • More than 50 of our attorneys have technical degrees and 21 are members of the Patent Bar.
  • More than 25 of our partners have first-chaired IP trials in various courts throughout the United States.
  • During the past five years, our attorneys have handled more than 500 patent cases and more than 130 Federal Circuit appeals.
  • Our ITC group has collectively appeared in more than 60 Section 337 ITC investigations.

Contact details

Winston & Strawn LLP
35 West Wacker Drive
Chicago IL 60601-9703
United States

Professional contacts