FacultyFaculty/Author Profile
David L. De Bruin

David L. De Bruin

Honigman Miller Schwartz and Cohn LLP

Chicago, IL, USA

Mr. De Bruin is a seasoned first-chair trial and appellate attorney. He concentrates his practice on patent litigation and related proceedings before the United States Patent and Trademark Office, and also litigates patent malpractice matters. Mr. De Bruin successfully argues legal issues, as well as explains complex technology to judges and juries. 

  • Tries patent cases in a variety of venues before judges and juries and has successfully argued numerous patent cases before the Federal Circuit Court of Appeals
  • Represents clients in a wide array of technology ranging from mechanical and electrical devices to biological and chemical patents
  • Serves as an arbitrator deciding securities claims and IP insurance coverage issues
  • Provides testimony as a Markman expert
  • Authors patent opinions and provides IP counseling


  • Prepared an amicus brief whose arguments were noted in a recent en banc ruling
  • Obtained a liability jury verdict in the Central District of California on a patent covering 3D computer modeling that lead to a recovery publicly valued in excess of $90 million
  • First-chaired jury trials in the rocket docket of the Western District of Wisconsin and, in a last minute substitution of lead trial counsel, obtained a willful infringement finding against Walmart in the District of Colorado
  • First-chaired a five-week long accountant liability trial that remains a leading accountant liability and attorney misconduct case in Wisconsin
  • Experienced in non-patent business litigation, including securities fraud, RICO and telecommunications fraud

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