Germany: Enforcing Patents In Europe – Germany As An Example

Last Updated: 9 April 2001
Article by Heinz Goddar

1. Enforcing Patents In The European Union (EU)

Whilst the international systems that have come into force in the past, namely the Patent Cooperation Treaty (PCT) and the European Patent Convention (EPC), did not touch and influence the kind in which patents could be enforced in the member countries of European Union (EU), by introducing of some kind of a Community Patent Convention (CPC) such situation will change dramatically. A discussion for the sake of simplicity will focus onto the situation in Germany for the purposes of this paper, similar provisions, as far as national and EPC based national parts of "bundle" patents are concerned, applying to the other EU countries, according to their respective national laws, however. A more detailed discussion of the principles of claim interpretation in Germany will follow.

1.1. Enforcing National Patents

If a patentee or other party entitled under the patent wishes to proceed against an infringer based on a national German patent, the patentee will file a suitable suit (litigation) at one of the patent infringement courts of first instance in Germany, essentially one designated patent chamber of the district courts for each federal state. As you may know, more than 70% of all patent litigations in Germany are filed at the Düsseldorf Court, which obviously is considered as the most competent and, to some extent, a court having a tendency to interprete the scope of protection of patents in favour of the patentee as broad as possible.

At the patent infringement court, the defendant will not be heard with the argument that the patent is invalid, rather the district court ifself will have to consider the patent as valid as long as the defendant does not file a separate invalidation procedure against the patent at the German Federal Patent Court at Munich. If the patent infringement district court considers the outcome of the pending invalidation procedure as probably being in favour of the defendant, it will suspend the infringement proceedings until at least a first instance decision of the Federal Patent Court in the invalidation procedure has been issued.

Against the decisions of the Federal Patent Court in the invalidation proceeding an appeal to the Federal Supreme Court is possible, and in case of the patent infringement proceedings an appeal against the patent infringement district court decision is possible to the respective patent appeal court for the respective federal state of Germany, and against the decision thereof, again, an appeal to the Federal Supreme Court.

Therefore, in two steps, as far as the invalidation proceedings are concerned, and in three steps, as far as the infringment proceedings are concerned, the litigation will end with the same authority, namely the Federal Supreme Court at Karlsruhe, where the final decisions will be made both in relation to the invalidation and the patent infringement proceedings.

1.2. Enforcing EPC Patents

Due to the fact that the EPC bundle "patent" is not really a central patent, but is, as far as enforcement is concerned, handled in the same manner as a national patent, the enforcing of EPC patents in Germany - and in all other member countries of EPC -takes place in an analogous manner as with national patents as discussed under 3.1. Common to national patents and EPC obtained bundle patents is the fact that any decision of the national courts, say German courts, as far as validity of the patent, injunction and damages are concerned, are only valid for the respective country, in our example Germany, and the proceedings in all other EPC countries would have to be conducted independently.

In many instances, from my experience, I can say that even foreign patentees chose the possibility of going through a patent litigation and invalidation procedure in Germany first, because it is rather cheap, compared with the situation e. g. in U.K., whereafter the outcome of the German procedure very often leads to an EU wide settlement between plaintiff and defendant, but one should bear in mind that, whilst a certain psychological influence of the German procedures onto the other EU courts may have to be expected, there is no such binding connection at all.

1.3. Enforcing CPC Patents

Certainly, it will be possible to enforce CPC patents EU wide, but the mechanisms to be used are not clear yet.

With some probability, a specific EU Patent Court of first instance will be introduced which probably will be the final appeal instance not only for litigation, but also for validity questions.

2. Specific Questions Of Patent Enforcement In Germany

2.1. Litigation Procedure And Arguments For Defence

2.1.1. General Procedure

Any litigation procedure in Germany generally is starting by filing an appropriate motion at one of the "Patentstreitkammern" of the Federal Republic of Germany, i. e. special chambers of selected German district courts, the most important of them being Düsseldorf, at which more than 60% of all patent litigations in Germany take place - there is no definite basis for that, but it is the most experienced one in patent matters. Another patent litigation court possibly known to you is that at Munich, another one at Hamburg. There are several others, but for the purpose of my today lecture here there will be no necessity to mention all of them. Generally a procedure at such a "Patentstreitkammer" will take about 1 - 2 years for the first instance, with an appeal possibility to the respective appeal court to which the "Patentstreitkammer" belongs to, the appeal instance normally taking another 1 - 2 years until final decision.

Against the decisions of the appeal courts further appeal to the Federal Supreme Court in Germany is possible, but only based on special appeal reasons of non-factual nature, like wrong interpretation of law etc., (the so-called revision procedure). It should be kept in mind, for the following discussion, that the ligitation courts are a part of the general civil court system in Germany, namely District Court (Landgericht/Patentstreitkammer) - Appeal Court (Oberlandesgericht/Patentsenat) - Federal Supreme Court (Bundesgerichtshof/Patentsenat). On the other hand, grant of patents and utility models as well as invalidation actions against those industrial property rights take place at the German Patent Office/German Federal Patent Court/German Federal Supreme Court or, in case of EPC based German patents, at the European Patent Office, as far as grant and opposition procedure are concerned - in the latter case again bearing in mind that any invalidation action against an EPC based German patent must be filed at the German Federal Patent Court, as in case of national German patents, i. e. there is no EPC invalidation procedure.

The aforementioned procedure, as far as „ordinary" litigations, i.e. with the exception of fast injunctions, are concerned, which will be dealt with specifically below, in the past only were started after appropriate warning of the defendant by a suitable warning letter, in order to avoid cost charging to plaintiff even in case of winning the litigation procedure if the defendant would have surrended immediately after starting court litigation. In recent times, however, this has become obsolete, because the Brussels Convention gives the potential defendant the possibility to start a declaratory action for non-infringement in any country within the European Union, whereafter no further "positive" patent litigation procedure can be started anymore by a plaintiff in another EU country during the pendency of the aforementioned procedure. If in such a case a defendant choses a country in which courts usually are known to work rather slowly, like e.g. in some regions of Belgium or Italy, the plaintiff would be prevented from proceeding quickly against the infringer. Accordingly, it is no longer appropriate to send warning letters before filing a complaint in Germany, rather only after filing of the complaint and serving it by the Court to the defendant settlement negotiations etc. should take place. Please note that in Germany, different from other countries, a complaint is considered as pending only after having been served by the court of litigation to the defendant, and not just by the plaintiff having filed the complaint at the court.

2.1.2. Defence In Case Of Litigation Based On National German Patents

The possible defense of an infringer accused of infringing a national German patent, besides of just arguing that he does not proceed as supposed by the plaintiff, is to argue that the scope of protection of the patent is not so broad that it covers the infringing features. In other words, without questioning validity of the patent itself, the defendant will argue that because of certain prior art the scope of protection of the patent is so narrow that the infringing article etc. does not make use of the protected teaching. The court, i. e. the infringement court, will have to take into consideration these arguments, following the general idea that a great invention will guarantee a great scope of protection guaranteed by § 14 of the German Patent Act, namely as given by the claims interpreted with the assistance of the specfication etc.

If by all means possible, therefore the defendant will start a counter-attack against the patent, with the aim of invalidating same, by filing an invalidation action at the German Federal Patent Court, the grounds of such invalidation action being the usual ones which also can be used in opposition procedures, namely lack of patentability due to lack of novelty or inventiveness. The Federal Patent Court will, within a period of 1 - 2 years, make its decision in the first instance of the invalidation action, whereupon a factual appeal takes place to the patent senate of the German Federal Supreme Court.

After the defendant has filed its invalidation action at the German Federal Patent Court, normally immediately after the respective litigation has been started at the litigation court by the plaintiff, the court of litigation has the possibility to suspend the litigation procedure until the invalidation procedure either in the first or in the second instance has been finalized, such suspension being up to the litigation court's opinion as to whether it considers the invalidation procedure to be with all probability successful or not. With German national patents that usually means that in cases where the patent in dispute has been granted without any opposition procedure, the litigation court normally will suspend the procedure in case of an invalidation action, whilst in case that a patent has been granted even after opposition, or even more after an appeal opposition procedure at the German Federal Patent Court, normally no suspension will take place, provided that not quite surprisingly new arguments are introduced into the invalidation procedure by the defendant. One could say: The more "hardened" a German national patent is by the various procedures it has already survived (examination, appeal, opposition, opposition appeal), the less probability does exist that any suspension will take place in a litigation procedure based thereon.

For the sake of completeness it should be added that, as a matter of course, an opposition procedure pending or introduced at the German Patent Office against a German national patent on which a litigation is based will have to be considered in the same manner by the litigation court, i. e. if it considers the opposition procedure to be most probably successful, it would with all probability suspend the litigation procedure based theron. In this connection, furthermore one should bear in mind that there are rather great differences in the suspension practice of the various German litigation courts, the Düsseldorf court, discussed already above, apparently being not inclined to suspend the litigation procedure whenever it seems to be appropriate to proceed, in order to prevent any factual suspension of the title and rights of the patentee in a litigation procedure.

2.1.3. Defence In Case Of EPC Based German Patents

Principally the defences for an infringer in a patent litigation procedure in Germany based on EPC based German patents are identical with those discussed above with the only point to be made that, with no material but quite considerable "technical" consequences, as discussed later on, even the opposition procedure in case of an EPC based German patent takes place at the European Patent Office, whilst in case of an invalidation action against the EPC based German patent the German Federal Patent Court will be the first authority under "national" practice, notwithstanding the fact that formally, as a matter of course, the requirements for patentability according to German Patent Law and European Patent Law are quite the same, with minor differences not playing a role in this connection.

2.1.4. Defence In Case Of Litigation Based On German Utility Models

Entirely different from the case of a patent, whether a national German patent or an EPC based German patent, being the basis of a litigation, in case of a utility model the defendant can, in the litigation procedure which is started at the litigation court, question the validity of the utility model itself. In other words, without starting any invalidation action at the German Federal Patent Office (with appeal possibility to the German Federal Patent Court), the defendant can win the litigation procedure by convincing the litigation court of lack of protectability of subject matter of the utility model in question. The other possibility, mostly chosen, however, is that also in this case the defendant will start an invalidation action against the utility model, and different from patent litigation procedure in which suspension of the procedure is more or less up to the litigation court and is ruled by the general provision of German civil law procedures, the German Utility Model law has a special provision according to which the court has to suspend the procedure if it considers the invalidation action to be successful, and may suspend it in general as long as it considers the outcome of an invalidation action as to be important for the litigation procedure. The duration of proceeding necessary is about the same as in patent cases.

2.1.5. Effectiveness Of Litigation And Duration Of Procedure

In many cases, the duration of a litigation procedure will have a considerable effect for the decision of the patentee whether a litigation really is worth to be conducted or not. According to this one should bear in mind that, as long as a litigation in Germany is based on a national German patent which is of "normal" quality, the chance that a litigation procedure is not suspended by the litigation court because of an invalidation action are fairly good; this applies parti-cularly if the litigation procedure is conducted at the Düsseldorf court. One may even say that in cases in which the patent has already overcome an opposition procedure at the German Patent Office, first instance, in general the particular Düsseldorf litigation court would not suspend the procedure at all.

On the other hand, it had to be observed that in case of European patents, even having overcome an opposition procedure at the European Patent Office, the procedure with a higher probability would be suspended in case of an invalidation started against this respective based German patent at the German Federal Patent Court. The reason for this may be that this is the first opportunity for a national German authority to "check" whether the patent "really" can be considered to be valid also under German practice: This does not mean, of course, that there would be any "material" difference in judging the protectibility of certain subject matter under European or German Law, but as a matter of facts it has turned out that it seems to be much easier to overcome the European Patent Office's objections against patentability, based on non-inventiveness, than in case of e. g. similar objections of the German Patent Office. Therefore some infringement judges in Germany have a tendency to think that a European patent first of all would really be checked only in the invalidition procedure at the German Federal Patent Court, with the consequence that the outcome of the litigation procedure would be highly dependent upon the invalidation procedure, and again with the aforementioned consequence that in such cases with all probability one would have to face the possibility of a suspension.

2.1.6. Special Aspects - Patent Restriction And Derivative Utility Model

A special note should be given to a situation in which an infringer is attacked based on a patent which is pending under opposition by a third party: In this case, the alledged infringer has the possibility to join the opposition procedure within two months after formal receipt of the respective patent litigation complaint, so that from then on the defendant acts as a co-opposer in the opposition procedure, with the full possibility to bring new arguments, prior art, etc.

A special note should also given to a situation in which the patentee, wishing to start patent litigation, knows that the patent is not fully valid, but would be so only in a restricted form: In this case, at the German Patent Office a restiction procedure should be started and completed before filing the patent litigation complaint, such restriction procedure not taking more than six weeks, so that a "hardened" patent can be used in the patent litigation.

The aforementioned possibility of a restriction procedure also exists in relation to an EPC patent designating Germany.

A further note should be given to a situation in which a patent applicant cannot yet attack patent infringing actions because the patent has not yet been granted: In this case the possibility of filing a so-called derivative utility model in Germany should be taken into consideration, which can be filed at any time during the life of a patent application before patent grant, in which case the utility model will enjoy both the priority and application date of patent at the German and European Patent Offices, respectively. The registration of such a utility model, after filing, will only take about three months, whereafter full injunctional and indemnification relief, as in case of a patent, can be obtained based on a litigation using the derivative utility model.

3. IP Related Fast Injunction Procedures In Germany

Foreign importers of goods, particularly at a time when they first try to enter the German market by showing a respective article on a trade show, exhibition or the like, very often have made the experience that apparently out of the blue sky they are confronted with a court order originating from a fast injunction procedure which forces them immediately to stop exhibiting the respective article, to terminate sales talks etc., even without having had the opportunity to be heard by the respective court. Such court orders in the instances to be dealt with in this article are based on Intellectual Property Rights (IPRs), i. e. patents, trademarks, designs, utility models, copyright etc., owned by a competitor which considers the respective article as an infringement of its IPR.

In order to develop suitable attack and defence strategies, the latter with the goal of avoiding court orders of the aforementioned injunctional nature, the German fast injunction procedure shall briefly be explained as follows:

In a fast injunction procedure, different from main litigation procedures, no claim for damages can be raised by the plaintiff, rather only a claim to cease and desist. As a first prerequisite for a fast injunction procedure, e. g. based on a patent, to be successful it is necessary for the plaintiff that he convinces the court that subject matter is urgent, i. e. that the delay otherwise caused by a normal litigation procedure and its duration, respectively, would be too detrimental for the plaintiff than to be balanced by the interest and right of the defendant to undergo a full-flesh litigation. Such urgency is assumed not to exist if certain time limits between the first getting knowledge of the allegedly infringing action by the plaintiff and the filing of the fast injunction complaint have expired. In the case of the district court of Munich, just as an example, such time limit is strictly four weeks, other courts in Germany are more liberal.

Furthermore subject matter must be clear and simple enough, at the discretion of the court, to be decided in an abbreviated fast injunction procedure, and in case of patent infringement that, just as an example, generally means that it is very difficult for the plaintiff to be successful in an injunction procedure if doctrine of equivalence questions play a role, rather only literal infringement would "help".

Also, if the validity of the IPR in dispute is doubtful, the court would not consider the fast injunction procedure as suitable. Similar considerations, i. e. in relation to both the question whether there is an infringement or not and to the validity of the respective IPR, apply to fast injunction procedures based on IPRs other than patents.

Principally, after a fast injunction request has been filed, the court has the possibility either to immediately issue a preliminary injunction, without any oral proceedings, i. e. before notifying the defendant beforehand, so that the first time the defendant gets knowlege of the injunction procedure is at the time when the court order is served to the defendant by the plaintiff. In such case, the defendant immediately has to stop the allegedly infringing actions, and its only relief is to oppose against the court order, whereupon within a short period of time, usually within several days or maximum a few weeks, in oral proceedings, in which both the defendant and the plaintiff participate, a first instance decision will be made as to whether the court order will be lifted or kept in force.

Between the serving of the court order and the aforementioned oral proceedings, in other words, all actions of the defendant have to be stopped, which, e. g., in case of an exhibition means that the defendant has to remove its respective goods from the exhibition immediately after receipt of the court order and has no chance anymore to put the respective goods back into the exhibition because the exhibition will have expired when the court order is lifted. This can be very troublesome for the defendant, in spite of the fact that, as a matter of course, the plaintiff if lateron the stopping of the actions of the defendant appears as not justified will have to remunerate the respective damages to the defendant.

The other possibility to act for the court, after having received the request for fast injunction from the plaintiff, is to serve that request to the defendant, requesting the defendant to comment on it, and simultaneously issuing oral proceedings, as above. In this case, before the oral proceedings there is no preliminary injunction order, and consequently the defendant has not to stop its actions before the Oral Proceedings and the decision to be made then by the court after having heard the parties. In other words, the defendant has the possibility to argue against the reasons of the plaintiff brought forward to the court in favour of the fast injunction request, using arguments of non-infringement, non-validity, etc.. As an example, in a patent procedure the defendant has a chance to prove that it has already filed an invalidation action against the respective patent, probable to be successful, etc..

If, either by prior knowlege or based on appropriate searches, a party (e. g. an importer) wishing to enter the German market place with new goods knows of certain IPRs of competitors that might be infringed, the importer will check whether a) there are good reasons to deny infringement and/or b) the IPR in question for good reasons would be invalid. If no such defence argument can be found, as a matter of course the importer better should not pose the respective article onto the German market. If good arguments for defence, however, can be found, the importer should choose a strategy which avoids the above mentioned risk of immediate court order to cease and desist without oral proceedings. In the following the mechanism widely used for this purpose in Germany should be discussed:

Since it is entirely up to the court whether after filing of a fast injunction request the respective cease and desist order issues immediately or only after appropriate defence of the defendant and after oral proceedings, it is obviously necessary to make the respective court aware of the defence arguments of the defendant before even a request for fast injunction is filed by a plaintiff. To achieve this pre-awareness of the court, it is customary to file a so called Protective Writ at the court or courts at which the respective plaintiff could file its request for fast injunction.

Assuming that the foreign importer in question has no legal residence or subsidiary in Germany, like in case of a U.S. entity, and that the only allegedly infringing action is the exposing of a respective article at an exhibition at a certain place in Germany, say Cologne, it obviously is only necessary to deposit the Protective Writ at the court under whose jurisdiction the respective exhibition is. Assuming that the risk of infringement exists in relation to a patent, and assuming that the exhibition would be at Cologne, the Protective Writ will only have to be deposited at the patent dispute chamber of the district court of Düsseldorf, which is responsible for the whole Federal State of Northrhine Westphalia, in which Cologne is situated.

If the article is not only to be exposed at a certain exhibition, but generally e. g. advertised for in Germany, the Protective Writ would have to be deposited, in case of patents, at each patent dispute chamber in Germany. If it is a trademark case, similar rules apply for courts having jurisdictions in trademark matters etc. Further details of the courts in question will certainly be discussed, as the author of this article warmly would like to recommend, between the importer and his domestic and German lawyers and patent attorneys, respectively, so that at least it can be made sure that the Protective Writ is deposited and thereby brought to the knowlege of each court at which a fast injunction request could be filed.

A Protective Writ of the aforementioned kind materially contains the possible arguments of defence of the defendant against an attack based on a certain IPR or certain IPRs. If invalidity arguments are included, e. g. in case of a patent, the Protective Writ would have to be accompanied by a draft invalidation request which the defendant would announce to immediately deposit at the German Federal Patent Court against a certain patent if the respective IPR (patent) would be tried to be enforced against the defendant. Generally, the Protective Writ in an abbreviated form would contain all arguments of defence, including affidavits, draft invalidation requests, etc.

The Protective Writ does just request the court that in case that a fast injunction complaint is filed no decision is made without prior oral proceedings, because of the reasons of defence as contained therein. Such a Protective Writ will be accepted by the respective court and "stored", but not be brought to the knowledge of the potential plaintiff until the plaintiff would really file a fast injunction request. In other words, if no fast injunction request would be filed, no third party, and particularly not the potential plaintiff, would get knowledge of the Protective Writ.

Whilst there is no absolute certainty that a court would consider such a Protective Writ, and a court in this case cannot be blamed by the defendant for not having respected the Protective Writ, in by far the majority of cases Protective Writs of this kind are carefully administered and considered by the respective courts and give a good basis for defence. Typically, depending on the subject value in dispute, for preparing and filing the Protective Writ a few thousand U.S. Dollars, based on service time spent, would have to be paid by the defendant as attorneys fees in Germany.

In summary, it should be stressed that fast injunction procedures in Germany are not seldom, and that appropriate measures for defence, as summarized above, should be duly considered by foreign entities before trying to enter the German market.

4. Border Crossing Infringement

In the European Union (EU) the principle of an EU wide exhaustion of patent rights has been generally adopted. Accordingly, as soon as a product has been brought into the market place in any of the EU countries with the explicit or implicit consent of the patentee, the free circulation of such product inside EU can no longer be prohibited by the patentee or its licensees. Accordingly, EU-wide so-called parallel imports are generally to be tolerated.

Since the principle of the admissibility of parallel imports, however, is tied to the consent of the patentee, a compulsory license granted in a certain EU country does not enable those goods freely to circulate inside EU in case that there are other parallel patents on which not such a compulsory license was imposed.

A further principle is that products produced under so-called rights of private prior use, i. e. in cases where a party before the priority date of the patent in dispute had already started using the invention in a certain country cannot freely circulate into countries inside EU where other parallel patents exist and no such private right of prior use was created.

It should be duly noted, in this regard, also, that the EU countries generally do not accept a world-wide exhaustion of patent rights.

5. Cross-Border Litigation

A few years ago, particularly by Dutch courts the practice was developped that in case of related patents, like national patents derived from a single EPC application, injunctional relief could be obtained by filing a complaint e.g. in the Netherlands, with effect also for the other countries of EU where parallel patents existed. Decisions of that kind have been difficult to enforce, and sometimes even impossible, e.g. in U.K.. In the meantime even the Dutch courts have restricted the aforementioned practice dramatically. The only safe way to obtain enforceable cross-border decisions in the member countries of the European Union in general and the EU in particular exists in case that the complaint is directed, based on possibly all parallel patents, against the defendant in its country of residence inside the European Union, in which case e.g. the German court, in the same manner as the Dutch court, will handle infringements of patents outside of Germany, too. If the court of jurisdiction, however, is not chosen because of residence of defendant, rather because of where infringing actions took place, only the patent(s) infringed in the respective territory, with strict territorial restriction, can be relied on.

This situation may change with the coming into force of a Community Patent soon, also with effect to EPC and even national patents, but nothing is sure in this regard for the time being. Insofar, everybody is waiting for the forthcoming draft of the Community Patent announced to issue during this year by the Commission of the EU.

6. Conclusions

The aforementioned explanations will hopefully have explained to some extent the

principles of patent enforcement in Germany, particularly also the principles of equivalency as used by the jurisdiction of the German courts in infringement situations nowadays.

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.

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From time-to-time our site requests information from users via surveys or contests. Participation in these surveys or contests is completely voluntary and the user therefore has a choice whether or not to disclose any information requested. Information requested may include contact information (such as name and delivery address), and demographic information (such as postcode, age level). Contact information will be used to notify the winners and award prizes. Survey information will be used for purposes of monitoring or improving the functionality of the site.


If a user elects to use our referral service for informing a friend about our site, we ask them for the friend’s name and email address. Mondaq stores this information and may contact the friend to invite them to register with Mondaq, but they will not be contacted more than once. The friend may contact Mondaq to request the removal of this information from our database.


This website takes every reasonable precaution to protect our users’ information. When users submit sensitive information via the website, your information is protected using firewalls and other security technology. If you have any questions about the security at our website, you can send an email to

Correcting/Updating Personal Information

If a user’s personally identifiable information changes (such as postcode), or if a user no longer desires our service, we will endeavour to provide a way to correct, update or remove that user’s personal data provided to us. This can usually be done at the “Your Profile” page or by sending an email to

Notification of Changes

If we decide to change our Terms & Conditions or Privacy Policy, we will post those changes on our site so our users are always aware of what information we collect, how we use it, and under what circumstances, if any, we disclose it. If at any point we decide to use personally identifiable information in a manner different from that stated at the time it was collected, we will notify users by way of an email. Users will have a choice as to whether or not we use their information in this different manner. We will use information in accordance with the privacy policy under which the information was collected.

How to contact Mondaq

You can contact us with comments or queries at

If for some reason you believe Mondaq Ltd. has not adhered to these principles, please notify us by e-mail at and we will use commercially reasonable efforts to determine and correct the problem promptly.