Chairs in a circle

Experts in technology and law

In our role as patent attorneys, each of us has a degree in science – in the fields of physics, chemistry, biochemistry, or biotechnology – and has been working with inventions in a wide variety of different technical fields for years.

To be able to represent you in all matters concerning patent law, trademark law, and the law of design patents and registered designs, we are admitted to practice as registered German Patent Attorneys (Patentanwälte), European Patent Attorneys, and European Trademark and Design Attorneys.

Our strengths: enhanced

We are delighted to welcome the experienced patent attorney Dr. Cornelia Müller in our team.

Patent attorneys


Dr. Matthias Achler


Your idea – our engagement – your right.

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Dr. Oliver Hartkorn, Dipl.-Phys., German Patent Attorney (Patentanwalt), European Trademark and Design Attorney

Dr. Oliver Hartkorn


You want to conquer the market or defend your existing market power? With the right strategy regarding patents, trademarks and designs you will be able to do so. We will be glad to assist you – with maximum honesty – and passionate dedication for your goals.

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Dr. Jan. Hiort, German Patent Attorney (Patentanwalt), European Patent Attorney, European Trademark and Design Attorney

Dr. Jan Hiort


Every creative achievement deserves to be protected for the person that has made it – whether it is a technical innovation, a characteristic mark, or the distinctive design of a product.

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Dr. Maximilian Knaus, M. Sc. Chem., German Patent Attorney (Patentanwalt), European Trademark and Design Attorney

Dr. Maximilian Knaus

M.Sc. Chem.

As your Patent Attorneys we share your enthusiasm for natural sciences and technology. We support you in obtaining, defending and enforcing intellectual property rights to turn your inventions into an economical advantage towards your competitors.

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Dr. rer. nat. Manfred Köppen, Dipl.-Phys., German Patent Attorney (Patentanwalt), European Patent Attorney, European Trademark and Design Attorney

Dr. Manfred Köppen


Investments in research and development are necessary in order to stay competitive. To protect these investments for as long as possible, an individual patent strategy must be developed and pursued.

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Dr. Cornelia Müller


‚Every step the mind takes in its progress towards knowledge makes an idea which is not only new, but the best too, for the time at least.‘ (freely quoted from John Locke) - Obtaining the right protection for your valuable ideas is a matter that is very close to my heart - be it as a patent, utility model, trademark or design.

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DR. Karsten Siebert, German Patent Attorney (Patentanwalt), European Patent Attorney, European Trademark and Design Attorney

Dr. Karsten Siebert


File first, then talk. To follow this rule, it is necessary to determine the right point in time to file applications for industrial property rights during the innovation process time and again.

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Dr. rer. nat. Roland Weber, Dipl.-Chem., German Patent Attorney (Patentanwalt), European Patent Attorney, European Trademark and Design Attorney

Dr. Roland Weber


Our clients can always count on us to give our all in enforcing their rights – and they have every right to do so.

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Dr. Klaus Mehler


You make the invention. We help you to develop it further and to round it off.

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In Employment

Niels Tobias Elzenheimer

Graduate Engineer (FH) Patent Engineering, M.Sc. (TU) Mechanical Engineering

As an engineer, I am used to determinedly look for solutions.

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Dr. Eva-Maria Stübling,  M. Sc. Phys., Patent Attorney Trainees

Dr. Eva-Maria Stübling

M. Sc. Phys.

We take care of all patent and trademark aspects which arise from your invention and support you with the same attentiveness, individuality and conscientiousness which also underlies your invention, such that you can focus totally on your technical area of expertise.

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Attorneys at Law


Claudia Bettendorf

Attorney at Law (Freelancer)

The protection, enforcement and defense of trademarks at national and international level requires competent and creative strategic consultancy taking into account the individual requirements. Clients can rely on this due to our commitment and our experience.

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In Employment

Dunja Tsoumanis ,Attorney at Law

Dunja Tsoumanis

Attorney at Law

A maximum protection of your trademark and design rights does not only require excel-lent knowledge of the legal requirements and framework conditions for the registration with the offices, but also an interest as well as an understanding for your company, its products, its services and its strategic orientation in the market and competitive environment.

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Office Management

In Employment

Gesa Buschmann, Patent law clerk, Office Manager

Gesa Buschmann

Office Manager

With regard to our internal quality management, we continually work on optimizing our workflows.

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Doris Reis, Consultant to the Executive Board

Doris Reis

Consultant to the Executive Board

For us, the individual professional development of each and every individual team member is of highest importance.

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Kathleen Wosniak

Deputy Office Manager

With our network, we combine regional roots with international compentencies in order to guarantee a successful and cooperative partnership for our clients. We always keep an eye on the optimization of our processes.

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Front and back office

Ideal for optimized processes.

We have a team of more than 25 expert and highly qualified employees covering various fields who take care of the official and administrative needs of our clients, as well as a great many technical and legal aspects.

That means that you can contact our staff whenever you have any questions, requests or suggestions.

Careers at WSL

Talent. Enthusiasm. Enjoyment.

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