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We pursue patent and utility model infringements effectively and sustainably.

The misuse of your patents and utility models can lead to significant revenue losses for your business. For this reason, we take decisive action against patent infringements and utility model infringements. In cases of patent infringements and utility model infringements, we swiftly enforce your claims for injunctive relief via formal warning letters and preliminary injunctions before the specialized patent courts; this is particularly crucial at trade fairs, where immediate action is essential. This is the only way to ensure the effective and lasting protection of your patents and utility models.


Furthermore, you are generally entitled to monetary damages, which we, of course, also recover on behalf of our clients, as well as a range of additional claims, specifically the destruction of infringing products and the disclosure of distribution channels, enabling you to take effective action against future infringements.

Received a cease-and-desist letter for patent or utiliy model infringement?

If you have received a warning letter yourself regarding an alleged patent infringement or an alleged utility model infringment, it is crucial to react promptly. Please send your warning letter to our firm via email for a no-obligation review; we will assess whether you are, in fact, infringing upon a patent or utility model and will defend you against any unjustified claims. We may already be familiar with your opponent.


Conversely, if you have received a warning letter from our firm, we recommend that you seek the assistance of legal counsel specializing in this field to ensure the matter is resolved as quickly and efficiently as possible.

Contact us

We offer initial consultations in patent law and utility model law at affordable and transparent fixed rates, which are credited against our fees should you decide to retain our services further.


Feel free to contact us by sending us an email or calling us at any time. We are looking forward to helping you with any issues relating to patent law and utility model law.

Attorney at law Andreas Erlenhardt, LL.M.

Bar-certified specialist attorney for intellectual property



We do business all over Germany. Our Düsseldorf office is located within the district of the Higher Regional Court (Oberlandesgericht) of Düsseldorf, to which the following communities belong: Hilden, Langenfeld, Meerbusch, Neuss, Krefeld, Kaarst, Ratingen, Mönchengladbach, Viersen, Kempen, Wuppertal, Erkrath, Haan, Remscheid, Mettmann, Solingen, Velbert, Oberhausen, Duisburg, Mülheim, Dinslaken and Kleve – we do not have offices in these cities but only in Düsseldorf. We have advised clients who are located in Berlin, Dortmund, Bremen, Köln, Dresden, Bochum, Bonn, Gelsenkirchen, Chemnitz, Kiel, Augsburg, Koblenz, Lübeck, Leverkusen, Oldenburg, Stuttgart, Osnabrück, Paderborn, Würzburg, Ulm, Offenbach, Bottrop, Hannover, Münster, Recklinghausen, Trier, Erlangen, Jena, Reutlingen, Nürnberg, Pforzheim, Göttingen, Heilbronn, Regensburg, Ingolstadt, Darmstadt, Heidelberg, Potsdam, Leipzig, Hamm, Kassel, Saarbrücken, Mainz, Freiburg, Aachen, Braunschweig, Wiesbaden, Karlsruhe, Mannheim, Bielefeld, Essen, Frankfurt and München.