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Your Patent Attorney
for patents, trademarks, design and licenses
Together with our international network of patent attorneys, we help you protect your invention worldwide and support you in the marketing and enforcement of your rights.
• Fast: we file your invention or your trademark the next day at the latest
• Established: if required, we will be with you on site within 24 hours
• Broad: we combine patent-law and international legal in-house expertise with a network of specialized patent attorneys and attorneys at law
• Experienced: we offer technical expertise from the material sciences via mechanics to computer programs and from molecular biology to biotechnology and their application particularly to motor vehicles, in medical and environmental engineering
• Flexible: we build on more than 30 years of serious and committed care for a wide range of clients from individual inventors to listed companies
In detail we offer you:
- Searches on technical, patent and trademark law aspects of all kinds
- Filing, maintaining and defending industrial property rights such as patents, utility models, trademarks, design and semiconductor topographies as well as company and naming rights
- Portfolio management and development
- Negotiation and drafting of licensing contracts
- International intellectual property protection
- Counsel and procedural support regarding employee invention law.
Prof. Dr.-Ing. Klaus Castell
klaus.castell@liermann-castell.de
Düren (02421) 40 50-0
München (089) 15 70 39 13
Aachen (0241) 70 58 75
Jülich (02461) 70 32 731
Call directly and get advice
Mo. until Fr. 8.00 until 19.00 Uhr
Prof. Dr.-Ing. Klaus Castell
klaus.castell@liermann-castell.de
Düren (02421) 40 50-0
München (089) 15 70 39 13
Aachen (0241) 70 58 75
Jülich (02461) 70 32 731
Direkt anrufen und beraten lassen
Mo. until Fr. 8.00 until 19.00 Uhr
Together with our international network of patent attorneys, we help you protect your invention worldwide and support you in the marketing and enforcement of your rights.
• Fast: we file your invention or your trademark the next day at the latest
• Established: if required, we will be with you on site within 24 hours
• Broad: we combine patent-law and international legal in-house expertise with a network of specialized patent attorneys and attorneys at law
• Experienced: we offer technical expertise from the material sciences via mechanics to computer programs and from molecular biology to biotechnology and their application particularly to motor vehicles, in medical and environmental engineering
• Flexible: we build on more than 30 years of serious and committed care for a wide range of clients from individual inventors to listed companies
In detail we offer you:
- Searches on technical, patent and trademark law aspects of all kinds
- Filing, maintaining and defending industrial property rights such as patents, utility models, trademarks, design and semiconductor topographies as well as company and naming rights
- Portfolio management and development
- Negotiation and drafting of licensing contracts
- International intellectual property protection
- Counsel and procedural support regarding employee invention law.
The trust of our long-standing national and international clients in our competence is our recommendation.
Should you need urgent help, we will be with you on site within 24 hours, if required. You can of course always make an appointment for a counseling interview at one of our locations. We will see to it that a competent contact person is at your disposal.
You can inform us of your projects by phone or by sending us your documents. In urgent cases we will make sure that your invention, trademark or design is lodged on the same day.
We know that in our area of consulting things can often be urgent. Thanks to our team and our office organization we are able to react quickly in order to protect your rights.
QLC® – Quick Low Cost
Filing inventions at the patent office for free
QLC® – filing makes it possible to secure a worldwide priority for an invention. This is allowed for by German law and international treaties. Only an application and a description of the invention are required. The priority only applies to the technical features described in that description. A patent based on the lodged documents can be applied for in Germany and abroad within a year after receipt by the Patent Office.
Other services
Portfolio management
Thanks to our portfolio management you have access at any time to an updated overview on your property rights and current law. This helps us in giving strategic counsel not merely on one particular property right but on the situation as a whole.
Services for founders
By developing strong connections with our clients, we are able to develop individual cost-efficient approaches. Costs need to be kept to a minimum, as long as no money can be earned with property rights.
Secretarial service
Our office works for our attorneys and also directly for our clients. We divide all work into attorney work and secretarial work. For most tasks, you will thus benefit of the reasonable hourly rates of our secretaries.
Our Team
Patent attorney
European Patent Attorney
European Trademark and Design Attorney
Patent attorney
European Trademark and Design Attorney
Patent attorney
European Patent Attorney
European Trademark and Design Attorney
Patent attorney
European Trademark and Design Attorney
Secretary’s office
We take care of your intellectual property matters, we register patents, utility models, trademarks and registered designs, we remind you of the annual fees due and of all the formalities necessary to obtain intellectual property rights. We write letters, correspond with patent and trademark offices and are at your disposal for any questions you may have.
