• Chemistry Diploma, University of Munich 2002

  • Chemistry BS with honors, Metropolitan University London 1998


  • German Patent Attorney

  • European Patent Attorney


  • Best Exam Paper B in the European Qualifying Examination (EQE) for the admittance as European Patent Attorney in 2009

Markus Coehn is a Partner at Peterreins Schley and responsible for the firm’s chemistry department. He focusses on contentious proceedings before the EPO having represented our clients in more than a hundred opposition and appeal cases, though he also has extensive experience in litigating patents and SPCs before the German District Courts, the Federal Patent Court, the Federal Court of Justice and the European Court of Justice.

On the prosecution side, Markus specializes in assisting clients in developing value-oriented patent portfolios and in portfolio mining. Both go hand-in-hand with extensive work on FTO- and patent landscaping analyses.

Before starting at Peterreins Schley, Markus was a Partner at the U.S. law firm Fish & Richardson P.C. Before joining Fish & Richardson P.C., he worked at the IP boutique Bardehle Pagenberg. Prior to his law career, Mr. Coehn worked as research assistant at the University of Munich developing antibiotics against Methicillin-resistant Staphylococcus aureus (MRSA).


  • Applied chemistry in the fields of consumer products, ink technologies, medical devices and battery materials.
  • All stages of drug development (drug discovery and lead optimization, medical indication, polymorph, formulation, and dosage patents).
  • High-performance polymers
  • Agrochemicals


  • Successfully represented client before the Federal Court of Justice in defending a roadblock patent for a high-performance polymer.
  • Obtained a preliminary injunction before a German District Court against an infringer in the field of medical devices, case settled favorably.
  • Successfully represented client in a pharmaceutical case before a German District Court, case settled favorably.
  • Represented a client in an SPC-related matter before the European Court of Justice.
  • Represents client in an infringement action before a German District Court concerning display technologies (ongoing).
  • Regularly represents clients in opposition matters in the various fields including medical devices, ink technologies, and battery materials.


  • Analysis: How the Brüstle ruling has changed the law. Managing Intellectual Property, MIP Issue 2011 Oct 19.
  • “Annotation to the Federal Supreme Court decision Olanzapin” in GRUR 2009, 382-389
  • “Annotation to the decision I-2 W 47/07 of the Upper District Court Duesseldorf– Olanzapin” in Mitt.PA 2008, 335-337
  • “European Case Law on Diagnostic Methods: ‘The Opinion G 1/04′” in GRUR Int 2006, 640-645
  • “European Case Law on Diagnostic Methods” in sic! 2006, 351-356

Patent- und Rechtsanwälte