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
Member of the German Examination Commission for Patent Attorneys
Since 2013
Mentor of the Technical University of Munich
Since 2013
Patent attorney at Maiwald
Patent attorney at Bardehle Pagenberg
Patent attorney trainee at Bardehle Pagenberg
Development engineer at BMW AG

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

  • We Help the Inventor to Protect the Idea
  • Inhouse training at Daimler, Stuttgart "Current case law on German patent law and ArbEG" January 2016
  • Inhouse training at Unitalen, Beijing, China "Patent Infringement Litigation in Germany" November 2016
  • Inhouse training at Heraeus, Hanau "Attack is also a defense" November 2016
  • Presentation at a start-up hub in Rio de Janeiro, Brazil entitled "Software Patent Protection in Europe and Germany" June 2018
  • Interview with Technical University Munich: "TUM Mentoring was a major door opener" July 2018
  • Conference presentation at the 10th Joint Korean- German Conference in Aachen, Germany, titled "Intellectual Property Protection of 3D Printing Inventions" October 2018
  • Lecture at Konstanz University of Applied Sciences entitled "From Invention to Enforcement of Patent" November 2018
  • Lecture at Aalen University "From Invention to Enforcement of the Patent" December 2018
  • 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 May 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 October 2019
  • Moderation of the Maiwald Seminar in Düsseldorf "Protection and Enforcement of Software Inventions in DE, KR & US" November 2019
  • Inhouse training at BMW, Munich "Current case law of the BGH on patent law" April 2016
  • Inhouse training at Stryker, USA "Patent infringement litigation in Germany" July 2016
  • Conference presentation at the Intellectual Property One-on-One Summit, Hangzhou, China with the title "Patent Litigation in Europe & (specifically) Germany" November 2016
  • Inhouse training at Bosch, Stuttgart "Current Patent Case Law of the German Federal Supreme Court" March 2017
  • Inhouse training at Alps, Japan "European Patent Proceedings" July 2017
  • Presentation at a start-up hub in São Paulo, Brazil entitled "Software Patent Protection in Europe and Germany" June 2018
  • Conference presentation at the conference "International IP Trends" with the title "New developments UPC/ Brexit" in Munich September 2018.
  • Moderation of the panel "Standard Essential Patents" of the Wiesn IP Forum in Munich October 2019
  • Moderation of the Maiwald Seminar in Munich " Employee Invention Law and Compliance" November 2019

  • German Patent Attorney Association
  • epi
  • LES
  • VPP

  • German
  • English
  • French