David S. Harper

, Ph.D.


David S. Harper is a partner with McDonnell Boehnen Hulbert & Berghoff LLP. Dr. Harper has more than 24 years of experience in the field of intellectual property law.  His practice comprises all phases of U.S. and foreign patent and trademark prosecution, intellectual property portfolio development, licensing and other agreement work, counseling, due diligence analysis, infringement analysis, and invalidity analysis. He has particular technical expertise in the areas of biologicals, pharmaceuticals, diagnostics, biochemistry, cell biology, immunology, molecular biology, and medical devices. He has developed intellectual property portfolios for diverse clients from start-ups to large companies, universities, and other non-profit institutions, many of which have resulted in valuable licensing deals for his clients.

  • Ph.D., University of Illinois at Chicago,

    Molecular Biology; Postdoctoral research, RNA-binding proteins and the abnormal proliferation of smooth muscle cells

  • B.S., Northern Illinois University,


  • J.D., Chicago-Kent College of Law,

    With High Honors, Order of the Coif

    Postdoctoral research, Duke University, RNA-binding proteins and the abnormal proliferation of smooth muscle cells

Bar Admissions
  • Illinois
  • U.S. Patent & Trademark Office


  • Illinois Super Lawyers Rising Star


  • Developing and managing IP portfolio involving automated cell screening assays for start-up client to successful licensing program and subsequent acquisition by Fortune 500 company
  • Developing and managing IP portfolios for a number of early stage drug development and diagnostics clients
  • Developing and managing IP portfolios in a wide range of technologies for a number of university clients, including coordinating with university licensees
  • Counseling of start-up and early stage clients, including non-infringement, invalidity, patentability, and freedom to operate opinions
  • Counseling of clients receiving federal funding to support technology development, including advising on steps required to obtain and maintain title to the technology