Jan Quellmann

Dipl.-Ing., Patent Attorney

Partner of the firm since 2017. His clients include national and international mid-sized companies as well as individual inventors in the fields of electrical engineering, electronics, measurement and control technology, computer and microprocessor systems technology, telecommunications, physics and mechanical engineering. He also advises on questions concerning trademark and design law as well as the German Employee Inventions Act.
Jan Quellmann assists his clients in all areas of intellectual property rights, whether in drafting, prosecuting and enforcing German, European and international intellectual property rights or in opposition and revocation proceedings as well as in infringement cases. Another focus of his work is strategic advice on third party intellectual property rights, for which he regularly prepares validity, infringement and FTO analyses.

Main focus in the sectors:

Electrical engineering


Measurement and control technology

Computer and microprocessor systems engineering



Mechanical Engineering


Jan Quellmann advises you in German and English.


Jan studied electrical engineering with a focus on telecommunications at the Technical University of Hamburg-Harburg. This was followed by several years of work in industry with a focus on development in electronic engineering. He completed his training as a patent attorney at the current firm (formerly Wenzel & Kalkoff), at the University of Hagen, at the German Patent and Trade Mark Office (DPMA) and at the Federal Patent Court from 2007 to 2010. He qualified as a patent attorney in 2010 and is a professional representative before the European Patent Office.


Jan Quellmann is an enthusiastic kite surfer and plays the piano and guitar in his spare time.

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