Ashley Hatzenbihler helps clients in the mechanical, electrical, software and telecommunications industries secure and enforce intellectual property rights. She prepares and prosecutes patents and trademarks for clients and also supports and counsels them through IP litigation.

Ms. Hatzenbihler draws on her background in mechanical engineering to understand the pertinent elements of clients’ complex innovations and advise clients on patent and trademark validity, infringement, and patentability.

Ms. Hatzenbihler is a member of MBHB’s Diversity and Inclusion Committee and Recruiting Committee. Ms. Hatzenbihler is also a member of the Intellectual Property Lawyers Association of Chicago (IPLAC), and serves as Co-Chair of the IPLAC Diversity, Equity, and Inclusion Committee and Vice-Chair of the IPLAC Copyright Committee. Outside of work, she has two cats, Ash and Ada, and attends weekly ceramics classes.

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


  • Managed trademark portfolios for clients in the fintech, medical diagnostic, health and wellness, and education spaces.
  • Drafted briefs and conducted discovery during litigation involving a client in the pharmaceutical industry.
  • Prepared and served cease and desist letters to enforce copyright and trademark registrations.
  • Advised clients on infringement, validity, and freedom to operate issues
  • Advised clients regarding their copyright and trademark rights and related portfolios.

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 Law360.com, 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.