Steven A. Zalesin - Patterson Belknap Webb & Tyler LLP
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Steven A. Zalesin

Listed in Best Lawyers since 2007
Phone: 212-336-2110

Steven Zalesin is a nationally recognized trial lawyer with extensive experience in intellectual property, false advertising and complex commercial matters. He has successfully tried cases and argued appeals in numerous courts throughout the United States. He has also represented clients in arbitration proceedings in several countries. 

A significant portion of Mr. Zalesin’s practice involves high-stakes commercial disputes in the pharmaceutical, medical device and biotech industries. He recently co-tried a closely-watched case on behalf of a leading pharmaceutical company against a competitor, arising out of the competitor’s acquisition of another major player in the industry. The case settled on terms favorable to our client. 

Mr. Zalesin also represents Fortune 50 companies in patent litigation. Earlier this year, he co-tried an ANDA case that resulted in an injunction against the launch of a generic version of our client’s billion-dollar AIDS drug. In another recent win, Mr. Zalesin obtained summary judgment on behalf of the world’s largest software company, demonstrating that a competitor’s patent on voice recognition technology was obvious as a matter of law. He is currently leading the worldwide defense of a biotech company’s groundbreaking patents on a drug that treats a rare genetic disorder.

For more than 25 years, Mr. Zalesin has represented the nation’s leading manufacturers and service providers in a series of landmark cases that have shaped the law of false advertising, while helping to preserve and grow the markets for our clients’ products. He represents the world’s leading beverage company in a high-profile dispute over juice labeling. In the district court, Mr. Zalesin obtained summary judgment dismissing the federal and state-law claims against our client, and in the Ninth Circuit he obtained an affirmance of the summary judgment ruling on the federal claim. The U.S. Supreme Court subsequently vacated the Ninth Circuit’s decision, so the case will now proceed to trial on the federal claim. In another recent matter for the same client, he successfully defended the launch advertising for the company’s reformulated sports drink against a federal court challenge by its chief competitor.

Mr. Zalesin also has substantial experience defending consumer class actions. He is currently representing major pet food, soft drink and orange juice producers in multi-district litigation over their product labeling and advertising. In the recent past, he has successfully defended the markers of several best-selling consumer products against similar claims.

Mr. Zalesin is listed in Chambers USA as a leading practitioner in the area of Advertising, where he is described as a “top-drawer,” “trustworthy” and “highly desired advertising litigator.” Clients praise his “superb conduct in front of judges and incredible industry knowledge.” In addition to his individual recognition, the firm has been named “Advertising Firm of the Year” by Chambers USA.

Mr. Zalesin is listed as “Litigation Star” in Euromoney Institutional Investor PLC’s Benchmark: America’s Leading Litigation Firms and Attorneys. He has also been recognized in The Best Lawyers in America® in the area of Advertising Law, and was named New York Advertising Lawyer of the Year for 2011. 

Additional Information

Court Admissions
  • U.S. Court of Appeals: Second, Third, Ninth, Federal, and D.C. Circuits
  • U.S. District Court, Southern and Eastern Districts of New York
Syracuse UniversityBS University of Pennsylvania Law School,J.D.
Editorial Advisory BoardAmerican Bar Association New York State Bar Association

Office Location

1133 Avenue of the Americas
New York, NY 10036
United States

Lawyer of the Year Awards

2011 Lawyer of the Year in Advertising Law of the New York City Metro Area
Steven A. Zalesin has earned a Lawyer of the Year award for 2011!

Practice Areas

Advertising Law