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Practice Areas

  • Intellectual Property
  • Advertising and Marketing Practices
  • Trademarks and Branding
  • Copyright
  • New Media
  • Litigation and Appeals
  • Sweepstakes and Promotions
  • Unfair Competition
  • Consumer Protection
  • Regulatory Compliance
  • Food
  • Children's Marketing
  • Life Science
  • Insurance


  • J.D. Northwestern University Pritzker School of Law 1993

  • B.A. Northwestern University 1990

Admissions and Qualifications

  • Illinois
  • U.S. Supreme Court
  • U.S. Court of Appeals for the Seventh Circuit
  • U.S Court of Appeals for the Ninth Circuit
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court for the Central District of Illinois
  • U.S. District Court for the Northern District of Illinois, Trial Bar

Prior Experience

  • Gardner Carton & Douglas LLP - Associate, Partner (1993-1998, 1999-2006)
  • Drinker Biddle & Reath LLP - Partner (2007-2019)
  • Faegre Drinker Biddle & Reath LLP - Partner (2020-2021)

Darren Cahr


Attorney Tabs

Publishing & Speaking

Representative Publications & Speaking Engagements

Recent Notable Speeches and Presentations:

  • Moderator, “Intellectual Property Trends to Watch in 2022 & Beyond,” SCG Legal Annual Meeting (September 2022)
  • Instructor, “The Metaverse: The Future of the Web and the Law Inside Your Head,” Continuing Legal Education Module (July 2022)
  • Speaker, “Trademarks and the Brain: Neuroscience and the Processing of Non-Literal Language,” Annual Meeting of the International Trademark Association Scholarship Symposium (January 2022) (with Sandra           M. Virtue, PhD)
  • Speaker, “Hot Topics in Advertising Law: Health and Wellness Claims,” National Advertising Division/BBB National Programs (March 2021)
  • Moderator, “What’s in a Name, Likeness and Image? The Prospect of a Federal Right of Publicity,” (December 2020)
  • Faculty, American Intellectual Property Law Association Design Rights Boot Camp (August 2019 and September 2020)
  • Speaker (General Session), “Social Media: Where is it Going, and Can We Ethically Get There?” International Trademark Association Annual Conference, Barcelona (May 2017)
  • Speaker, “Ethics in Social Media Controversies,” Intellectual Property Owners Association Annual Meeting, Chicago, IL (September 2015)

Selected Publications:

  • “Trademarks and the Brain: Neuroscience and the Processing of Non-Literal Language,” The Trademark Reporter, Vol. 112, Issue 4 (July-August 2022) (with Sandra M. Virtue, PhD)
  • “Important New Laws Will Have Ripple Effect for IP Owners, Practitioners,” Indiana Lawyer (April 2021) (with Lou Perry)
  • “How to Find and Protect Your Own Hidden Trademarks,” National Law Review (February 2021)
  • “Will New FTC Endorsement Guidelines Make a #Hashtag of Influencer Advertising?” National Law Review (March 2020)
  • “New U.S. Counsel Rule for Foreign TMs Promises Sea Change,” Law360 (July 2019) (with Melissa Dillenbeck)
  • “The Privacy Wars: Too Much, Too Little, or Too Late?” Bloomberg (May 23, 2019) (with Katherine Armstrong)
  • “Tech Brings Authentication Challenges in Ad and IP Cases,” Law360 (March 2019) (with Tore DeBella)
  • Contributing author, Telecommunications Law Answer Book, Practicing Law Institute (2014 – 2021) (chapter on social media)
  • Contributing author, Consumer Protection Law Developments, American Bar Association (2009)
  • Contributing author, Copyright Law and Policy in a Networked World, National Association of College and University Attorneys (2007)
  • “Of PACS and Trolls: How the Patent Wars May Be Coming to a Hospital Near You,” The Health Lawyer, Vol. 19, No. 1 (October 2006) (with Ira M. Kalina)
  • “False Advertising Claims: Proceedings at the NAD,” National Law Journal (January 1, 2006)
  • “March Madness: Dual Use Reverse Confusion and the First Amendment,” Selected Legal Papers, Vol. XVI, No. 1, American Intellectual Property Law Association, (April 1997)