All team members


Dr-Ing. Sophie Ertl


German Patent Attorney

European Patent Attorney

Mechanical Engineer

Sophie Ertl has wide-ranging experience in handling legal disputes occurring in the intellectual property field. She has successfully represented clients in numerous patent and utility model infringement cases as well as in patent nullity and utility model cancellation proceedings. Sophie drafts patent applications and represents clients in patent prosecution, opposition and appeal proceedings. In addition, she regularly prepares legal opinions on technical and legal issues, including freedom-to-operate and validity analyses. Her technical expertise covers the fields of mechanical engineering, medical devices, materials engineering and automotive and aeronautical technologies.

A particular highlight of Sophie’s professional career was her successful defense of a well-known US corporation operating in the field of medical devices against a number of attacks by patent trolls.

since 2020
Member of the Board of Directors of the German Patent Attorney Association
since 2017
Partner, shareholder and managing director at Maiwald
2017 - 2018
Member of the German Examination Commission for Patent Attorneys
since 2013
Mentor of the Technical University of Munich
since 2013
Patent attorney at Maiwald
2010 - 2013
Patent attorney at Bardehle Pagenberg
2006 - 2009
Patent attorney trainee at Bardehle Pagenberg
2003 - 2006
Development engineer at BMW AG

Admitted to practice as European patent attorney
Admitted to practice as German patent attorney
2006 - 2009
Studied law for patent attorneys at the University of Hagen
2003 - 2006
Doctoral degree in the field of mechanical engineering and materials science from the RWTH Aachen University
1998 - 2003
Studied mechanical engineering at the Technical University of Munich

  • Patent prosecution and portfolio management
  • Filing strategies and drafting patent applications
  • Freedom-to-operate and validity analysis
  • Opposition and nullity proceedings
  • Patent litigation

  • Recommended in Handelsblatt | Best Lawyers "Germany's Best Lawyers" 2021
  • Recommended in Legal 500 Deutschland 2021
  • Recommended in MIP IP Stars 2021

  • Wir helfen dem Erfinder, seine Idee zu schützen, 2021
  • Moderation of the Maiwald Seminar in Düsseldorf “Protection and Enforcement of Software Inventions in DE, KR & US”, 2019

  • Conference contribution at the Joint Seminar of Unified Patents and Maiwald “Achieving European collaborative deterrence strategy against Non-practicing entities” entitled “NPE patent litigation in the UPC” and participation in the panel discussion in Munich, 2019

  • Moderation of the panel “Standard Essential Patents” of the Wiesn IP Forum in Munich, 2019

  • Conference contribution at the 11th Joint Korean- German conference in Changwon, Korea entitled “Intellectual Property Protection in Mobility” and participation in the panel discussion, 2019

  • Moderation of the Maiwald Seminar in Munich “Employee Invention Law and Compliance”, 2019

  • TUM Mentoring was a major door opener, 2018
  • Conference presentation at the 10th Joint Korean- German Conference in Aachen, Germany, titled “Intellectual Property Protection of 3D Printing Inventions”, 2018

  • Conference presentation at the conference “International IP Trends” with the title “New developments UPC/ Brexit” in Munich, 2018

  • Lecture at Konstanz and Aalen University of Applied Sciences entitled “From Invention to Enforcement of Patent”, 2018

  • Presentation at a start-up hub in Rio de Janeiro, Brazil entitled “Software Patent Protection in Europe and Germany”, 2018

  • Inhouse training at Bosch, Stuttgart “Current Patent Case Law of the German Federal Supreme Court”, 2017

  • Inhouse training at Alps, Japan “European Patent Proceedings”, 2017

  • Inhouse training at Heraeus, Hanau “Attack is also a defense”, 2016

  • Inhouse training at BMW, Munich “Current case law of the BGH on patent law”, 2016

  • Inhouse training at Daimler, Stuttgart “Current case law on German patent law and ArbEG”, 2016

  • Inhouse training at Stryker, USA “Patent infringement litigation in Germany”, 2016

  • Conference presentation at the Intellectual Property One-on-One Summit, Hangzhou, China with the title “Patent Litigation in Europe & (specifically) Germany”, 2016

  • Inhouse training at Unitalen, Beijing, China “Patent Infringement Litigation in Germany”, 2016

  • German Patent Attorney Association
  • epi
  • LES
  • VPP

  • German
  • English
  • French