Leydig, Voit & Mayer, LTD. Intellectual Property Law

H. Michael Hartmann


 Mr. Hartmann is active in all phases of intellectual property law with an emphasis in intellectual property litigation and technology protection and transfer in the United States and internationally. He has acted as trial counsel in jury and bench trials, ITC proceedings, and related pre-trial and appellate proceedings in diverse technical fields including software; telecom; machine vision and semiconductor manufacturing; oil field drilling technology; stand-by power generation; ethylene oxide catalysts; molecular sieve zeolites; polymeric lenses and membranes; x-ray film emulsions; and gypsum wall board manufacture. His international experience includes directing legal proceedings in courts in England, Germany, and France, as well as before the European and Japanese Patent Offices. He has participated in a number of domestic and international technology transfer and licensing transactions.

Mr. Hartmann was born in Frankfurt, Germany and is fluent in German. Prior to joining the firm, he served on the engineering staff of Mobil Oil Corporation (now ExxonMobil) and worked as an intern with a German patent firm. He has lectured before several groups, including AIPLA, the Practicing Law Institute and the Chicago International Trade Association. He is a member of a number of national and international professional organizations. 

Professional Affiliations

  • American Intellectual Property Law Association (AIPLA)
  • Association Internationale Pour La Protection De La Propriété Industrielle (AIPPI)
  • Intellectual Property Law Association of Chicago (IPLAC) (Board of Managers, 2009)
  • Richard Linn Inn of Court
  • VPP – Vereinigung von Fachleuten des Gewerblichen Rechtsschutzes (the German IP lawyers association)
  • U.S. Bar-EPO Liaison Council (former Chair)
  • Intellectual Property Owners Association (IPO)


Articles and Publications


  • Named Best Lawyers’ Chicago Patent Law "Lawyer of the Year," 2013
  • Named among “The Top 100” Leading Business Lawyers in Illinois by Leading Lawyers Magazine – Business Edition 2012
  • Named as one of "The World's Leading Patent Practitioners" - Intellectual Asset Management's IAM 1000 (2012)
  • Named among “The Top 100” Illinois Super Lawyers, 2010-2015
  • Named in the Illinois Super Lawyers list, Intellectual Property Litigation, 2005-2015
  • Listed in The Best Lawyers in America® in the area of Intellectual Property Law, 2008-Present
  • Listed in America's Leading Lawyers for Business, Chambers USA, 2007-Present
  • Selected by peers as a Leading Lawyer in Intellectual Property Law – Leading Lawyers Network, 2004
  • Listed among the Top Lawyers in Illinois in Intellectual Property Law – Chicago Lawyer
  • AV® Preeminent™ Peer Review Rated (Highest Rating) – Martindale-Hubbell

Speaking Engagements and Presentations

  • "The External Perspective: The European Patent Package from the perspective of a US-applicant," European Patent Package National (Patent-) Law as Infrastructure for the Unitary Patent, Mannheim, Germany, February 7, 2014
  • "Managing U.S. IP Litigation: A View from the Inside," VPP Conference, Mainz, Germany,
    October 20, 2011
  • "Lifecycle Management Strategies for Blockbuster Medicines: Brand and Generic Perspectives," LexisNexis 3rd Annual Pharma and Biotech Conference, Shanghai, China, September 22, 2011
  • "Wrestling with Trade Secret Damages: Insights from a Plaintiff’s and Defendant’s Perspective," American Intellectual Property Law Association's (AIPLA) 2011 Spring Meeting, Palace Hotel, San Francisco, CA, May 13, 2011
  • "Litigating Against Acquired Patents," American Intellectual Property Law Association's (AIPLA) 2010 Mid-Winter Institute, La Quinta, California, January 27-30, 2010
  • Speaker on "Mock Direct and Cross-Examination of an Expert in a Patent Case," Intellectual Property Law Association of Chicago (IPLAC), Patent Law Symposium 2009, September 25, 2009
  • Hosted presentations during the 2009 Inside Counsel SuperConference, Chicago, IL, May 5-6, 2009


Bar Admissions and Registrations

  • Illinois, 1976
  • Registered to practice before the U.S. Patent and Trademark Office


  • U.S. Supreme Court
  • U.S. District Court for the Northern District of Illinois (Member, Trial Bar)
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Fifth Circuit
  • U.S. Court of Appeals for the Seventh Circuit
  • U.S. Court of Appeals for the Eleventh Circuit


  • German