David Callahan is local Chair of the Litigation Department 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 20 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 2014, BTI named Mr. Callahan a “Client Service All-Star” and IP Law and Business named him one of the “Top 50 Under 45” IP lawyers in the country. Law and Politics has regularly listed him as an Illinois “Super Lawyer” since 2005 and Chambers and Partners named him to its Chambers USA, America’s Leading Lawyers for Business 2011-2013 editions. Intellectual Asset Management magazine named Mr. Callahan to the 2014 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).