German and European Patent & Trademark Attorneys

Jostarndt Patent and Trademark Attorneys AG is the first patent and trademark attorney firm in Germany in the form of a joint stock company. This form of organization makes us more efficient and flexible – to your advantage. Our guiding principal: we deliver tailor-made solutions. To that end, we offer innovative solutions and technologies, which are without parallel. From our office in Aachen, we advise clients from all over the world in the widest variety of patent attorney-related services:

Large Enterprises

Patents are a valuable asset, which is why they should be correspondingly professionally and proactively processed, so that no rude awakenings occur. Protect your strategic business assets – we can help you with this!

Medium-Sized Enterprises

The protection of inventions, trademarks, designs, or of design and utility models by means of a patent is also critical for you – we undertake analyses and searches!


Per §9 PatG (German Patent Act), solely the holder of a patent has the rights of use, but there are, of course, exceptions, in particular for research. We are happy to give advice in this area, and should this concern your idea, we will take on the path to the patent office, with all the hurdles – we work cost-efficiently!


The first idea or invention has been born, but what do the next steps look like, what still has to be done? At this juncture, we come into play, and we advise comprehensively during implementation; from analysis up to publication. Our initial assessment is cost-free!

For your carefree future! We offer comprehensive services of the highest quality – individualized, solution-oriented, and cost-effective. Here you will find a short overview of our competences, follow the link for further information:

Areas of Expertise

Not off the rack – custom-tailored!

IP services suited (to) you.

The chairman of the board of the patent attorney firm is Dr. Hans-Dieter Jostarndt. He has extensive experience from decades-long work as an admitted patent attorney and as a corporate patent attorney for major technology companies.



Metzgerstraße 61
52070 Aachen


Phone number:

+49(0) 241 400 71 – 0

Fax number:

+49 (0) 241 400 71 – 21

We work in close cooperation with the patent attorneys of dompatent von Kreisler in Cologne.