Michael P. Brennan (Mike)

Principal / Detroit Metro Office

Mike joined Harness Dickey in 1984, after working in the Office of the General Counsel for The Procter & Gamble Company. He became a partner in 1987 and has been a Managing Principal at the Firm for over 17 years. After 12 years in the Litigation group, Mike shifted his emphasis to strategic counseling, agreements and risk management involving technology, trademarks, service marks and e-commerce, as well as the purchase and sale of intellectual property and intellectual property rights.


Mike lectures on many topics, including:

  • Substantive and procedural patent and trademark law
  • Discovery in intellectual property litigation
  • Taking and defending expert depositions
  • AIA

Awards & Distinctions

  • Best Lawyers, Patent Law, 2016-2020
  • Leading Lawyers, named a “Leading Lawyer” for Copyright & Trademark, Intellectual Property and Patents, 2014-2019
  • Managing Intellectual Property, “IP Stars,” 2013-2019
  • Michigan Super Lawyers, Intellectual Property, 2008, 2011-2018
  • Martindale Hubbell AV Preeminent® rated for 15 years by both peers and the judiciary, the highest ranking possible for both ethical standards and professional ability
  • Dbusiness Magazine, “Top Lawyer,” Intellectual Property, 2010


  • American Bar Association
  • American Intellectual Property Law Association
  • Michigan Bar Association
  • Michigan Intellectual Property Law Association
  • Intellectual Property Law Institute, Officer


J.D., magna cum laude, University of Detroit, 1981

B.S., Biology, cum laude, Aquinas College, 1976

B.S., Chemistry, cum laude, Aquinas College, 1976

Bar & Court Admissions


U.S. Supreme Court

Court of Appeals for the Federal Circuit

Court of Appeals for the 6th Circuit

Michigan Supreme Court

Ohio Supreme Court

U.S. Patent and Trademark Office