Patrick Kelly is a patent attorney in the Intellectual Property practice group with more than 30 years of experience in life sciences. He also has extensive experience in conducting validity, due diligence and freedom-to-operate studies; formulating and maintaining biotech IP estates; and preparing and prosecuting patent applications related to the life sciences.

Pat has advised pharmaceutical, biotech and scientific instrumentation companies in all aspects of patent law, including preparing and prosecuting patent applications, formulating and maintaining biotech intellectual property estates, due diligence, freedom-to-operate studies and licensing.

He has also represented pharmaceutical companies in intellectual property litigation matters, including patent infringement and abbreviated new drug applications. With a background as an academic scientist, Pat is deeply knowledgeable in biochemistry, immunology, virology, proteomics, genomics, transgenic animals, gene therapy and drug delivery systems.


Prior to joining Armstrong Teasdale, Pat served as counsel at a large Philadelphia law firm. He was also a partner at patent and general practice law firms and an adviser to startup programs and medical technology incubators. In addition to his practice as external patent counsel, Pat has served as on-site patent counsel for his clients, including at a biotech/pharmaceutical company where he was acting director of intellectual property.

Pat has been a guest lecturer at the Centers for Disease Control, Pennsylvania Bar Institute, Biotechnology Partners and several universities, including Emory University School of Law, Georgia Institute of Technology, Johns Hopkins University, Penn State Hershey Medical School, Temple University Beasley School of Law, UCLA and University of Delaware.


  • Temple University  (J.D., cum laude, 1997)
  • Georgia Institute of Technology  (Ph.D., 1991)
  • University of Maryland  (M.S., 1986)
  • Georgetown University  (B.S., 1984)


  • Pennsylvania
  • U.S. Patent and Trademark Office

Professional Activities

  • American Bar Association
  • Pennsylvania Bar Association
  • Philadelphia Intellectual Property Law Association

Charitable and Civic Involvement

  • Georgia Institute of Technology Applied Research Corporation Board of Trustees (Member)
  • Emory University Advisory Board, Biomedical Engineering (Former Member)
  • Johns Hopkins University Carey School of Business (Advisor)
  • University City Science Center, QED and Phase One (Advisor)


  • Pennsylvania Super Lawyers®, Rising Star (2005-2007)
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