Photo, Alexander Ritter

Alexander Ritter

Baker McKenzie Rechtsanwaltsgesellschaft mbH von Rechtsanwälten und Steuerberatern


Alexander Ritter is a German qualified attorney at law (Rechtsanwalt) and heads Baker McKenzie's German Patent Litigation Practice. He has more than 10 years of litigation experience and is one of the few patent litigators in Germany who also have a technical background (master's degree in computer science).

Alexander has represented clients before the German patent infringement courts at the district court and appellate level, in EPO opposition and appeal proceedings, and in nullity actions before the German Patent Court and the Federal Supreme Court.

Practice Focus

Alexander’s practice focuses on patent litigation. He further advises on technology transactions. His experience in patent litigation includes clients and technologies of various industries (high-tech, mechanics, chemical, medical devices, biotech) as well as coordinating lawsuits in multiple jurisdictions. He especially has in-depth knowledge in the field of computer implemented inventions including operating systems, communication protocols, embedded systems, and security and payment technology.

Representative Legal Matters

  • Representing a leading supplier of IoT technology in a dispute with its main competitor in patent infringement and validity proceedings relating to six SEPs.
  • Consulting the Japanese government on rules about SEP negotiations.
  • Representing a leading US healthcare company in infringement and validity proceedings in a pan-European dispute and coordinating the proceedings abroad.
  • Representing a Japanese manufacturer of audio products in a case relating to the MP3 standard, the case including complex questions of licensing, antitrust and patent law.
  • Representing a European specialty chemical company against a competitor in a case relating to membrane technology.
  • Represented a producer of consumer goods in inspection proceedings in a case relating to chemical engineering.
  • Representing a manufacturer of printer accessories in infringement and several EPO opposition proceedings (mechanical engineering).
  • Representing a mobile communication company in several patent infringement proceedings relating to operating systems and image compression (software).

Professional Associations and Memberships

  • German Association for the Protection of Intellectual Property & Copyright (GRUR) - Member
  • Licensing Executives Society (LES) - Member 
  • Association of Intellectual Property Experts (VPP) - Member


  • German District Courts and Higher Regional Courts~Germany (2012)
  • German Federal Patent Court~Germany (2012)
  • German and European Patent Office~Germany (2012)


  • University of Trier (Diplom Informatik) (2010)
  • Oberlandesgericht (Zweites Staatsexamen) (2009)
  • University of Trier (Erstes Staatsexamen) (2006)


  • English
  • French
  • German


  • Co-author "Infringement Hunting in Times of Digitalization and Industry 4.0," on obtaining evidence for software patent litigation together with Harald Heiske (Head of Software IP at SIEMENS), Mitteilungen der deutschen Patentanwälte, January 2022
  • Co-author "Germany Chapter" in "The Patent Litigation Law Review," Law Business Research Ltd., November 2017


  • Alexander has given the keynote at the 2022 VPP spring symposium speaking about asserting software patents and discussed the topic in a panel with judges and industry representatives.
  • Seminar together with i.a. an EPO BoA member and a leading lawyer from the EPO comparing EPO case law with decisions from the German validity courts.