BDPE Patent Attorneys and Attorneys at Law

Ottostraße 4
D-80333 München

Fon +49 (0)89 – 21 53 819-0
Fax +49 (0)89 – 21 53 819-19


BDPE Patent Attorneys and Attorneys at Law

Platz der Ideen 2
D-40476 Düsseldorf

Fon +49 (0)211 – 30 27 66-0
Fax +49 (0)211 – 30 27 66-10

Dr. Dirk Müssig

Patent attorney | Düsseldorf

Patent Prosecution

„Franck Klein also offers up his expertise on this mandate and earns praise from another satisfied patron for being “extremely skilled, open minded and collaborative. He takes the time to discuss matters in person, which speeds up the process and brings in better results thanks to the exchange of information and brainstorming that happens during such conversations. Franck is also proficient in all three official languages of the EPO, so he grasps the nuances of language used in patent applications and can propose new arguments in opposition proceedings on this basis.“

– IAM Patent 1000 Guide 2024

„Further strengthening the set, Markus Kreuzberg thrives when working with domestic companies seeking protection across the globe. He adroitly oversees the drafting and filing of international patent applications for companies including Conradi+Kaiser, a family-owned business that has established itself as a leader in rubber moulded parts.“

IAM Patent 1000 Guide 2024

„We selected them because of their outstanding performance in nullity actions and defence work in infringement actions.“

- IP STARS 2023

„The firm understands the business of the client and is clear and transparent in its communication. Excellent forensic work.“

- IP STARS 2023

„In the fields of physics, electrical engineering and electronics, and mechanical patent litigation, the firm sets new standards for Germany.“

- The Legal 500 – Germany

„For contentious proceedings, in particular for nullity proceedings or infringement proceedings accompanied by patent attorneys, Maikowski & Ninnemann, BRAUN-DULLAEUS PANNEN EMMERLING, df-mp as well as the already mentioned Bardehle Pagenberg and Cohausz & Florack are among the top addresses; Zimmermann & Partner Patentanwälte mbB and Maiwald Intellectual Property also enjoy an excellent reputation in the market.“

- The Legal 500 – Germany

„Four partners and several staff work proactively to provide a complete service ranging from providing non-infringement or infringement arguments, successfully fighting for or against the validity of patents, knowing about and finding necessary evidence, suggesting workarounds to problems, and usually winning cases or suggesting useful solutions.“

- The Legal 500 – Germany

„Service-oriented patent attorneys who go above and beyond for their clients. The attorneys exhibit the knowledge level of top technical specialists and, through this, light can be shed on weak arguments of the opposite party.“

- IAM Patent 1000 Guide 2022

„The patent attorneys are all highly experienced and drive their work while being practical and efficient.“

- Chambers 2021

„The team is detail oriented, sensible and shows great judgement.“

- IAM Patent 1000 Guide 2021

Dr. Dirk Müssig | Patentanwalt | BDPE Düsseldorf

Dr. Dirk Müssig joined Braun-Dullaeus Pannen Emmerling (BDPE) as a patent attorney in October 2019, and has been working in the field of intellectual property for more than 8 years.

His focus is on patent prosecution in the area of telecommunications, energy networks, electric and electronic systems, electric vehicle, power electronics, lasers, optics, medical devices, mechatronics/mechanical engineering as well as physics in general.

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Prior to working as a patent attorney, he worked as a patent attorney trainee at BDPE and at Bonnekamp & Sparing, gaining experience mainly in patent prosecution and opposition proceedings.

Dirk additionally spent part of his patent attorney training at the Higher Regional Court of Düsseldorf, where he worked in the Intellectual Property Litigation Senates of the presiding judges Dr. Kühnen and Mr. Voß.

Prior to his training as a patent attorney, Dirk worked as a consultant in the pharmaceutical industry in the statistical evaluation of drug studies. Part of his work is focused on the market access of drugs.

He obtained his doctorate in medical physics in the field of tumor therapy with heavy ions at the GSI Helmholtz Center for Heavy Ion Research.

He completed his studies in physics at the Technical University of Darmstadt.

Fon +49(0) 211 – 302766-37


  • German Patent Attorney
  • European Patent Attorney
  • PhD (TU Darmstadt)
  • Physics Diploma (TU Darmstadt)

Authorized to represent

  • Germany:
    • Federal Court of Justice (only patent nullity proceedings)
    • Federal Patent Cout (BPATG)
    • German Patent and Trade Mark Office (DPMA)
  • Europe:
    • Unified Patent Court (UPC)
    • European Patent Office (EPO)
    • European Union Intellectual Property Office (EUIPO)

Technical fields

Telecommunications/ Mobile Communications

Connected cars

Optics and medical technology



Mechanical Engineering