MUNICH

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

mail@bdpe.de

DÜSSELDORF

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

mail@bdpe.de

Zhenyu Xu 徐震宇

Chinese Patent Attorney |  Munich

Patent Litigation

"In Munich Friedrich Emmerling and Franck Klein are the names to know. Emmerling comes in for high praise as “an exceptionally skilled patent attorney with deep technical expertise, knowledge and strategic insight. He has ample experience in patent litigation and showcases a commitment to achieving optimal outcomes for his clients in every case, always striving to find the best solution.” Klein is appreciated for his “experience in handling patent litigation of standard-essential telecommunication patents."

– IAM 1000 2025

"Tech-savvy Franck Klein blends immense IP knowledge with refined commercial sensibilities, providing practical, tailored advice. He is particularly praised for his "experience in handling patent litgiation of standard-essential telecommunication patents."

– IAM 1000 2025

„Friedrich Emmerling can provide actual strategic advice due to his excellent technical understanding and wealth of experience. In my opinion, having an eye for the “bigger picture” while simultaneously knowing the details is what sets him apart from many others.“

– The Legal 500 Deutschland 2025

„Franck Klein deeply understands all the relevant technical details of the related technologies and, based on this, selects the best arguments and provides us with great results.“

– Chambers Global Guide 2025

„Friedrich Emmerling is always willing to go one step further. Franck Klein has a high level of technical expertise.“

– The Legal 500 Deutschland 2025

„Friedrich Emmerling's technical knowledge is exceptional. He is a very good patent attorney.“

– Chambers Global Guide 2025

„Karl-Ulrich Braun-Dullaeus can also explain very complex technological contexts in a generally understandable way. In my experience, he was often able to develop decisive arguments, especially when working together in large joint defense groups.“

– The Legal 500 Deutschland 2025

„Franck Klein has excellent analytical skills.“

– Chambers Global Guide 2025

„Friedrich Emmerling - very experienced, strategically very adept.“

– The Legal 500 Deutschland 2025

„Friedrich Emmerling is a goal-oriented lawyer who will not give up fighting for additional arguments if he sees any chance of obtaining better results for his clients.“

– Chambers Global Guide 2025

„Franck Klein: strategically and professionally convincing; efficient way of working and convincing communication.“

– The Legal 500 Deutschland 2025

„Franck Klein is a very high-quality lawyer whose technical proficiency is exceptional.“

– Chambers Global Guide 2025

„Friedrich Emmerling is a very experienced lawyer and a strong strategic thinker who knows judges and opponents inside out.“

– Chambers Global Guide 2025

„Franck Klein is always very much available.“

– Chambers Global Guide 2025

„Friedrich Emmerling is an excellent strategist who has a wealth of experience and performs convincingly.“

– Chambers Global Guide 2025

„Friedrich Emmerling's team is characterized in particular by its considerable experience in contentious patent proceedings. All members of the team are very sociable, making it easy to work with them. Work products are delivered quickly, punctually and are always very well-founded and meaningful.“

– The Legal 500 Deutschland 2025

„Highly committed team with an efficient and structured way of working, very good specialist knowledge and excellent availability.“

– The Legal 500 Deutschland 2025

„High level of willingness to get to grips with and understand all the details of the technology. Very short response time.“

– The Legal 500 Deutschland 2025

„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

„Friedrich Emmerling is a high-quality lawyer whose technical proficiency is exceptional.“

– Chambers Global Guide 2025

„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

„They have vast experience in litigating telecom patents. The team is very approachable and easy to work with. The responsiveness is great, and the knowledge of EPO as well as FPC case law is unbeatable.“

- IP STARS 2024

„I would choose BDPE for their excellent technical expertise in the area of telecommunication as well as for their professionalism. Their managing partner, Friedrich Emmerling, would approach a problem from all possible directions and find a solution for the client.“

- IP STARS 2024

„Excellent collaboration during patent litigation, with knowledge about technological aspects of the case.“

- IP STARS 2024

„Karl-Ulrich Braun-Dullaeus is very experienced, accessible, and good-humoured. He is open for legal tech.“

- IP STARS 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. Friedrich Emmerling | Partner | Patentanwalt | BDPE München

Zhenyu Xu is a qualified Chinese patent attorney with experience in intellectual property since 2017. He holds a Bachelor’s and a Master’s degree (BEng & MSc) in Mechanical Engineering from Soochow University in China. He also earned an LL.M. in International Studies in Intellectual Property Law and Data Law from Technische Universität Dresden in Germany. During his legal studies, he specialized in European patent law with a particular focus on patent claim interpretation before the European Patent Office (EPO), which he explored in depth and defended by his Master’s thesis.

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Before joining BDPE, Zhenyu held roles as a Patent Counsel at POSITEC and SIEMENS. In these positions at leading global technology enterprises, he gained substantial experience and expertise in handling patent applications, especially in drafting and prosecution before the China National Intellectual Property Administration (CNIPA), and became proficient in IP risk management, particularly in patent freedom-to-operate analysis for international projects. Zhenyu’s expertise spans across mechanical engineering, automotive engineering, electrical engineering, artificial intelligence, and robotics.

At BDPE, Zhenyu assists our German and European patent attorneys in providing clients top services in all aspects of intellectual property regarding patent litigation in Germany and Europe. He joined BDPE in 2025 as a Patent Engineer and is currently trained to become a European Patent Attorney. While pursuing his LL.M., he also gained hands-on experience as a part-time patent trainee at BDPE.

Zhenyu is fluent in both Mandarin and English.

Fon +49 (0)89 – 21 53 819-25
zhenyu.xu@bdpe.de

Qualifications

  • Chinese patent attorney
  • Mechanical Engineering (BEng & MSc Soochow University)
  • International Studies in Intellectual Property Law and Data Law (LL.M. Technische Universität Dresden)

Technical fields

Mechanical engineering

Automotive engineering

Electrical engineering

Artificial intelligence

Robotics