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

Lan Bi

European Patent Attorney | Munich

Patent Ligitation

„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

Lan Bi | Patentanwältin | BDPE München

Lan Bi (毕兰) has been working in the field of intellectual property since 2013. Her main areas of practice include patent litigation in the telecommunications sector and video and audio coding technology. Through extensive professional experience and technical training, she has gained in-depth knowledge in the technical areas of telecommunications, video and audio coding, information technology, cloud computing, software, electronics and optical technologies.

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Lan has actively participated in patent litigation, nullity proceedings and opposition proceedings before the German Federal Patent Court (Bundespatentgericht – BPatG), the Federal Court of Justice (Bundesgerichtshof – BGH) as well as the European Patent Office (EPO). Her strengths include developing convincing lines of argumentation for various proceedings by taking full advantage of her extensive working experience and her educational background in both technology and intellectual property law. She is adept at digging into the technical details of the case in order to find compelling arguments for the benefits of the clients.

Lan joined BDPE in March 2021. Prior to this, she worked at the law firm Boehmert & Boehmert in Germany as well as a large telecommunication company in China. Her practice involved drafting and prosecution of national and international (e.g., EP and PCT) patent applications in the field of telecommunications, information technology, cloud computing, video and audio coding and software, patent portfolio management and assistance of invalidity and infringement matters. Since January 2015, she has been qualified as a Chinese patent attorney.

Lan studied optical engineering at Beihang University (BUAA) with a focus on signal processing and close-loop control system design for optical sensors. She obtained a Master of Engineering degree from BUAA.

She also studied intellectual property and competition law and obtain a Master of Laws (LL.M.) degree from Munich Intellectual Property Law Center (MIPLC) at the Max Planck Institute for Innovation and Competition in collaboration with the Technical University of Munich (TUM), University of Augsburg, and George Washington University Law School (Washington, D.C.).

Furthermore, she holds Bachelor of Engineering (B. Eng.) in control technology and instrument from East China Jiaotong University and Bachelor of Laws (LL.B.) with a focus on intellectual property law from East China Jiaotong University.

Fon +49 (0)89 – 21 53 819-25


  • European Patent Attorney
  • Qualified Chinese Patent Attorney
  • Master of Engineer (Beihang University)
  • Master of Laws (LL.M.) in intellectual property and competition law (MIPLC at the Max Planck Institute for Innovation and Competition)

Authorized to represent

  • Europe:
    • Unified Patent Court (UPC)
    • European Patent Office (EPO)

Technical fields

Telecommunications/ Mobile Communications

Electrical and information technology

Audio-video encoding

Renewable energies

Connected cars