He is a leading lawyer in Intellectual Property, and clients say he is "very measured, in terms of the advice he gives."Chambers USA 2017

David K. Callahan

  • 330 North Wabash Avenue, Suite 2800
  • Chicago, IL 60611
  • USA

David Callahan is Global Co-Chair of Latham & Watkins’ Intellectual Property (IP) Litigation Practice and a trial lawyer who focuses on complex litigation in the areas of patent, trademark, trade secret, false advertising, and unfair competition.

Mr. Callahan has more than 25 years of experience litigating intellectual property matters, has tried numerous bench and jury trials, and has argued many appeals before the Federal and Seventh Circuit Courts of Appeal. He has particularly significant experience in the area of medical device patent disputes, and he has represented clients in a diverse range of other technologies including semiconductors, consumer products, automotive products, and business methods, among many others.

In 2018 and 2014, Mr. Callahan was named to BTI Consulting Group's Client Service All-Star List, which recognizes leaders in superior client service identified exclusively by corporate counsel. IP Law and Business named him one of the Top 50 Under 45 IP lawyers in the country and Law and Politics has regularly listed him as an Illinois Super Lawyer since 2005. Mr. Callahan was recognized by Chambers USA 2017 for his work in Intellectual Property, and he was named in Chambers USA, America’s Leading Lawyers for Business 2011-2013 editions. In their 2018 edition, The Best Lawyers in America recognized Mr. Callahan for his work in Litigation-Intellectual Property law. Mr. Callahan was named to the 2017 IAM Patent 1000 and LMG Life Sciences listed him as a “star” in its 2012 edition. Mr. Callahan is also included in The International Who’s Who of Business Lawyers 2011-2014 in the area of patents.

Mr. Callahan is a member of the Advisory Board for the DePaul University Center for Intellectual Property Law and Information Technology (CIPLIT).

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