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Patrick J. Arnold Jr.


Patrick J. Arnold Jr. has been practicing intellectual property law at McAndrews, Held & Malloy since he graduated from law school in 1990. While his practice has been concentrated in patent, trademark and copyright litigation, he also assists clients in prosecution, counseling and licensing. Pat has been lead trial counsel on many lawsuits and has extensive experience with all pretrial, trial and post-trial activities in the federal courts. He has tried cases to both judgment and jury verdict in federal court, and before the Trademark Trial and Appeal Board. He has also handled full evidentiary and partial-evidentiary preliminary injunction hearings, along with arguments before the Federal Circuit Court of Appeals.

Pat’s background in physics has enabled him to work on a wide variety of intellectual property matters.  He has represented clients that range from one of the world’s leading manufacturers of motorized wheelchairs to one of the world’s leading television programmers. Pat’s patent practice has involved diverse areas of technology, ranging from complicated materials handling systems, automated chemical additive systems, and mail sorting systems to the anatomy of a horse's foot.

His copyright and trademark practice has included several cases relating to grey market goods, along with cases relating to widely popular figurines, novelty motion lamps, and product designs for awnings for recreational vehicles.

Honors & Awards

  • Illinois Super Lawyer, 2012-2016
  • Illinois Leading Lawyer, 2004-present

Professional & Community Involvement

  • Member of the Federal Civil Practice Section Council, Illinois State Bar Association
  • Officer, International Network of Boutique Law Firms – Chicago Chapter
  • Former Vice Chair of the Intellectual Property Section Council, Illinois State Bar Association
  • Former Committee Member, Business Alliance Group of the Metropolitan Club of Chicago
  • Former Member, Board of the Glenview Education Foundation


  • Could Summary Jury Trials Provide a Lower Cost Litigation Alternative? Executive Counsel (Aug/Sept 2012, pp 56-59)


  • “Making Packaging a Team Player in Brand Protection,” Automotive Aftermarket Products Expo’s 2011 Learning Forum, November 2011
  • “Emerging Trends in Business: Intellectual Property,” Chicagoland Chamber of Commerce, April 2011

Areas of Practice


Bar Admissions / Registrations

  • U.S. District Court for the Northern District of Illinois, Member of Trial Bar
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Fourth Circuit
  • U.S. Court of Appeals for the Ninth Circuit
  • Supreme Court of Illinois
  • U.S. Patent and Trademark Office


  • Loyola University, J.D.
  • University of Illinois, B.A., Economics (Dean's List, Alpha Lambda Delta Academic Honorary, Phi Eta Sigma Academic Honorary)
  • Illinois Institute of Technology, Physics