Portrait of Detlef von Ahsen

Detlef von Ahsen


  • Joined K&W in: 2010
  • Admitted as Attorney: 1996


  • Dipl.-Ing. in General Mechanical Engineering
  • Patent Attorney
  • European Patent Attorney
  • European Trademark and Design Attorney


  • German
  • English
  • French

Academic and professional career

Technical University of Darmstadt
Studies of General Mechanical Engineering

1990 – 1992: Product Engineer at Baker Hughes Inteq, Celle
1992 – 1994: Patent Attorney Trainee at Meissner, Bolte & Partner, Bremen
1994 – 1995: Patent Attorney Trainee at the GPTO/BPatG, Munich
Since 1996: Self-employed Patent Attorney

Special Fields at K&W

Mechanical Engineering, Legal, Trademark & Design

Grant proceedings for patents in the field of mechanical engineering.

Opposition, revocation, nullity and infringement proceedings, in particular in the fields of mechanical engineering, automotive engineering, shipbuilding, electric machines, packaging machines, machine tools, materials, process engineering, plant variety rights, trademarks and designs.


  • AIPLA (American Intellectual Property Law Association)
  • AIPPI (International Association for the Protection of Intellectual Property)
  • BayPat (Bavarian Patent Attorney Association)
  • BDPA (Federal Association of German Patent Attorneys)
  • Chamber of Patent Attorneys (from 2002 until April 2020 Member of the board)
  • EPI (European Patent Institute)
  • EPLIT (European Patent Litigators Association)
  • FICPI (International Federation of Industrial Property Attorneys)
  • GRUR (German Association for the Protection of Intellectual Property)
  • INTA (International Trademark Association)
  • LES (Licensing Executives Society)
  • Patent Attorney Association Lower Saxony-Bremen (1997-2011 Member of the board)
  • VDI (The Association of German Engineers)
  • VPP (Association of Intellectual Property Experts)

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