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David J. Harth



David Harth, a partner in the Litigation practice, is a trial lawyer who has spent his career handling high-stakes civil litigation, often involving complex scientific and technical issues. He has more than 30 years of experience trying all types of cases, including patent, trademark and copyright infringement, product liability, environmental damage, engineering and accounting malpractice, civil rights, public law, securities fraud, insurance recovery, and Uniform Commercial Code actions. David also has considerable experience arguing cases in federal and state courts of appeal. For the past 20 years, he has focused on intellectual property litigation and has served as lead trial counsel in a number of high-profile patent and trademark infringement cases, many involving pharmaceuticals, biotechnology and human genetics. David makes extensive use of computerized litigation management systems and case presentation technology.

Professional Recognition

  • American College of Trial Lawyers, Fellow
  • Named the Best Lawyers’ Madison "Litigation - Patent Lawyer of the Year," 2014
  • Listed in The Best Lawyers in America 2001 - Present: Commercial Litigation; Copyright Law; Litigation - Intellectual Property; Litigation - Patent; Patent Law
  • Listed in Chambers USA America's Leading Business Lawyers
  • Recognized as an IP Star by Managing IP, 2013
  • Listed in Wisconsin and Washington, D.C. Super Lawyers magazine
  • Recipient of the Wisconsin Equal Justice Fund's Howard B. Eisenberg Lifetime Achievement Award, 2010
  • Recipient of the "Richard E. Guggenhime Pro Bono Award," 2006
  • William Gorham Rice Civil Libertarian of the Year, 1999

Professional Leadership

  • Chair, Western District of Wisconsin Bar Association Pro Bono Committee, 1994 - 2009
  • American Intellectual Property Law Association
  • American Bar Association, Litigation and Intellectual Property Sections


  • Hon. John W. Reynolds, U.S. District Court for the Eastern District of Wisconsin, 1979 - 1980


  • University of Wisconsin Law School, J.D., Order of the Coif, 1979
    Articles Editor, Wisconsin Law Review, 1978 - 1979
  • University of Wisconsin, B.A., 1976

Bar Admissions

  • Wisconsin

Court Admissions

  • U.S. Supreme Court
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Seventh Circuit
  • U.S. Court of Appeals for the District of Columbia Circuit
  • U.S. District Court for the Western District of Wisconsin
  • U.S. District Court for the Eastern District of Wisconsin