Ashley Hatzenbihler


Ashley Hatzenbihler concentrates her practice on intellectual property law matters, including patent prosecution in the mechanical & materials practice area.

Prior to joining MBHB, Ms. Hatzenbihler interned in the small engine industry, putting to use her mechanical skills in several departments to execute projects relating to current product support, product design, and research and development. Ms. Hatzenbihler also received her Masters in mechanical engineering, where her research centered on analyzing the energy content of diesel fuels. During this time, her responsibilities included designing and building electromechanical systems, developing testing procedures, executing experiments to analyze combustion reactions, and data analysis.

During law school, Ms. Hatzenbihler was an Associate Editor for the Loyola University Chicago Law Journal and the Loyola University Chicago International Law Review, a Research Assistant for Professor Kalyani Robbins, a Judicial Extern for the Circuit Court of Cook County, and an Academic Tutor for Constitutional Law and Property Law.

Ms. Hatzenbihler is a member of the Intellectual Property Lawyers Association of Chicago (IPLAC), and serves as Co-Chair of the IPLAC Diversity, Equity, and Inclusion Committee.


  • B.S., Marquette University, Mechanical Engineering
  • M.S., Marquette University, Mechanical Engineering
  • J.D., Loyola University Chicago School of Law
Bar Admissions
  • Illinois

Published Articles

Michael Borella and Ashley Hatzenbihler “Think Twice About Appealing a § 101 Rejection to the PTAB” PatentDocs, September 13, 2022.

James Lovsin and Ashley Hatzenbihler “A Look at Federal Circuit Composition as 40th Birthday Nears” IP, May 10, 2022.

Michael Borella and Ashley Hatzenbihler “On the Nature of Prior Art in the 35 U.S.C. § 101 Inquiry” PatentDocs, August 10, 2021.

James Lovision, George “Trey” Lyons, III, and Ashley Hatzenbihler “Supreme Court Upholds PTAB and Clarifies USPTO Director Power Under 35 U.S.C. § 6(c)” Snippets, June 22, 2021.

Michael Borella and Ashley Hatzenbihler “The Three Properties of Patent-Eligibility: An Empirical Study, PatentDocs” PatentDocs, July 30, 2020.

Ashley Hatzenbihler “Optimal Conditions for Measuring Ignition Quality in Non-Engine Tests” Masters Thesis, Marquette University, June 2019.

Christopher Johnson, Jeff LaJeunesse, Peter Sable, Ashley Hatzenbihler “Photon Doppler Velocimetry Measurements of Transverse Surface Veolocities”, 2020 Rev. of Sci. Instruments, 2018.