Dr Ing Sophie Ertl > Maiwald GmbH > Munich, Germany > Lawyer Profile

Maiwald GmbH

Work Department

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.


German Patent Attorney
European Patent Attorney
Representative before the UPC
Mechanical Engineer


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
2014 – 2016 Mentor for the training for the qualification as European Patent Attorney
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


German, English, French


  • epi
  • LES
  • VPP


2023 Admitted to practice before the UPC
2013 Admitted to practice as European patent attorney
2010 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

Lawyer Rankings

Germany > Intellectual property > Patent litigation: patent lawyers

Maiwald GmbH, with headquarters in Munich, is experienced in disputes, particularly in opposition proceedings before the EPO, but also has expertise in nullity and infringement proceedings. Pharma and chemistry are among the practice’s central specialist areas, which are covered by Eva Ehlich and Derk Vos among others; both are often instructed by US and Japanese clients. Biotechnology, electrical engineering and mechanical engineering form additional practice pillars; Sophie Ertl and Alexander Schmitz are among the key contacts for the latter.