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Attorneys at Law Hannover
Patent Attorneys
Georgstr. 48
30159 Hannover (Headquarter)
Fon +49 511.35 73 56-0
Fax +49 511.35 73 56-29
Attorneys at Law Berlin
Patent Attorneys
Wittestraße 30 K
13509 Berlin
Fon +49 30.403 66 69-00
Fax +49 30.403 66 69-09
Attorneys at Law Bielefeld
Patent Attorneys
Herforder Str. 69
33602 Bielefeld
Fon +49 521.43 06 06-60
Fax +49 521.43 06 06-69
Attorneys at Law Bremen
Patent Attorneys
Parkallee 117
28209 Bremen
Fon +49 421.33 11 12-90
Fax +49 421.33 11 12-99
Attorneys at Law Düsseldorf
Patent Attorneys
Grafenberger Allee 293
40237 Düsseldorf
Fon +49 211.97 26 95-00
Fax +49 211.97 26 95-09
Attorneys at Law Frankfurt/ Main
Patent Attorneys
Alfred-Herrhausen-Allee 3-5
65760 Frankfurt-Eschborn
Fon +49 69.380 79 74-20
Fax +49 69.380 79 74-29
Attorneys at Law Hamburg
Patent Attorneys
Colonnaden 5
20354 Hamburg
Fon +49 40.882 15 83-10
Fax +49 40.882 15 83-19
Attorneys at Law Munich
Patent Attorneys
Landsberger Str. 155
80687 Munich

Fon +49 89.250 07 90-50
Fax +49 89.250 07 90-59
Attorneys at Law Stuttgart
Patent Attorneys
Königstraße 80
70173 Stuttgart
Fon +49 711.99 58 55-90
Fax +49 711.99 58 55-99
Patent Attorneys Vienna
Trauttmansdorffgasse 8
1130 Vienna
Fon +43 1.876 15 17
Fax +49 511.35 73 56-29


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What is a patent?

  • What requirements must a patent comply with?
  • What is not patentable?
  • How long is patent protection effective?
  • What territorial protection does a patent provide?
  • Is it allowed to make public an invention prior to registration (novelty period of grace)?
  • How to apply for a patent?
  • What is the procedure of granting a patent?
  • How can action be taken against a patent – opposition/nullity proceedings?
  • Is there a European patent?

What is a patent?

A patent gives the patent holder the exclusive exploitation right including a prohibitive right. Only the patent holder can commercially exploit the patented invention, so that he can prohibit third parties from manufacturing, advertising, marketing and using or even owning or applying the patented procedure as well as of the object obtained by it.

What requirements must a patent comply with?

Patents are issued for inventions which are new, which involve an inventive step and which lend themselves to industrial application (§ 1 (1) Patent Act). “Only inventions” are patentable. An invention is a technical solution, which solves a technical problem by means of so-called inventive step. An invention is considered new if it goes beyond state-of-the-art technology (§ 3 (1) Patent Act). State-of-the-art technology comprises all knowledge which has been disclosed to the public up to the day of the application by means of a written or oral description, utilisation, etc. Therefore, inventions cannot be presented to the public before their application has been filed – especially not by the inventor – i.e. they especially cannot be exhibited at fairs or even explained in detail.

An invention must stand out from state-of-the-art technology by an inventive step or an invention is characterised by the so-called level of invention (§ 4 Patent Act). The required invention level is reached if an invention lies above the average knowledge of an expert.

Lastly, the invention must be commercially applicable (§ 5 Patent Act), i.e. it must be possible to manufacture and utilise it commercially. This characteristic usually has a special importance in the area of therapeutical or diagnostic medicine; in all other cases, the requirement concerning commercial applicability is usually fulfilled.

What is not patentable?

Most objects are in principle patentable, there are, however, explicit exceptions. Inventions which are not patentable include (§ 1 (2) Patent Act): discoveries as well as scientific theories and mathematical methods, aesthetic creations (protection of registered designs is usually possible), plans, rules and procedures for intellectual activities, for games or for business activities, as well as for software as such (at the moment the question of the patentability of software is being discussed again based on US software patents; presently software is protected by copyright under German law), as well as representation of information (such as forms, charts, etc.). Further exceptions include (§ 2 Patent Act): inventions which involve violation of moral principles, as well as plant varieties (protection under plant breeders’ rights is possible), animal species and biological procedures for growing plants and breeding animals, except for microbiological procedures and their produce.

In spite of these areas of exception, technical appliances in these areas might be patentable, as long as they do not violate moral principles.

How long is patent protection effective?

Protection expires 20 years after the day when the application giving rise to the patent is first filed, as long as the patent is maintained by paying the annual fees.

An exception is a so-called Supplementary Protection Certificate for pharmaceutical products, which after the patent protection expires provides further protection of the maximum of 5 years when certain requirements are met.

What territorial protection does a patent provide?

Presently there is neither a worldwide patent nor a European Community patent (although it has been proposed in 1989). However, on the basis of the so-called Patent Cooperation Treaty simplifications have been made for an international registration of a patent in numerous countries.

Until today patents are protected only nationally, in spite of international efforts, among which GATT-TRIPS are especially important. A German patent application results in protection of the invention in Germany only. If a patent is to be protected in England as well, an autonomous English patent must be applied for. The Patent-Cooperation-Treaty merely makes the application procedure easier.

Is it allowed to make public an invention prior to registration (novelty period of grace)?

In Germany an invention has to be registered before it can be made public in any way whatsoever. An invention is made public when samples of the invention are handed out to third parties that exhibit, sell or advertise such products, so that the invention is revealed in advertising materials. Therefore, if such samples are passed on, they should be accompanied by a comprehensive agreement to maintain secrecy. On the one hand, the invention should not be revealed in such an agreement, but on the other, it should be described precisely enough, so that there are no doubts with regard to the subject matter of the agreement to maintain secrecy. It is in principle not harmful to reveal a patent to an individual, although this might in some cases mean that it is made public in this way. Thus, it is generally not recommended to reveal an invention in any way. A restriction applies only in the case of an obvious infringement to the disadvantage of the applicant or his representative or on world exhibitions. In such cases the announcement can remain harmless within 6 months before filing an application, as long as additional requirements are met.

In some countries there is, however, a so-called novelty period of grace. This means that inventions can be made public – as long as certain requirements are met – in a specified period prior to application. In the USA the novelty period of grace is one year.

How to apply for a patent?

German patents generally come into being by filing a patent application to the German Patent Office. There is a form available from the German Patent and Trademark Office ( Apart from this form, which includes an application, so-called patent claims, a description and a summary in German should be handed in. For the purpose of a better description, drawings are usually included. When filing an application, which will be scanned by the Patent Office, you should pay attention to a number of formal requirements, e.g. that the description, the claims and the summary each start with a special form and should be marked with an appropriate title. Moreover, there is almost a patent language of its own, in which certain expressions are used for structuring the text, signalling consequences etc.: the patent claims often include the expression “characterised by…” followed by the description of the actual invention, whereas the state of technology is delineated prior to this including references to existing patents. The description is usually introduced with the expression “the invention concerns” and the generic term of the main patent claim is described. This is followed by the description of the state of technology, possibly including references to existing patents. After the basic description of the state of technology, the disadvantages are presented. Then, the expression “the task of the invention is …” introduces the description of the task, presenting the solution and its advantages. This description of the main claim is followed by the descriptions of the subordinate claims, introduced by the expression “… is a special type of implementation of …” Finally, a sample implementation is explained in detail by means of drawings.

When defining patent claims, and especially the main claim, the wording is very important. Basically, a general description is preferred, in order to prevent competitors from avoiding an infringement of patent by merely changing minor points. On the other hand, the wording of patent claims must not be too general as there is a risk that they might be ineffective, because such a claim usually does not only contain the description of the invention but also elements of state-of-the-art technology.

What is the procedure of granting a patent?

On filing, the patent application is checked for obvious formal faults, e.g. if documents are lacking, etc. After that, according to the type of application a research or examination procedure is started. Later, a Patent Office examiner with an appropriate technical background examines if the patent application conforms to patent requirements, i.e. especially to the central questions concerning novelty and inventive step. Special attention is paid to the patent claims, since it is them that define the scope of the protection sought by the applicant. Patent Office examiners often have one or more questions which need to be answered before a patent can be granted. As long as they do not relate to the main aspects of the major claim, it is enough to change the application correspondingly or to convince the examiner that no changes are necessary.

The whole examination procedure can easily last up to two years, whereas the unexamined patent application is disclosed already after 18 months. Therefore, the question if a subsequent application for the same object should be filed has to be answered early. In case of a subsequent application, e.g. a subsequent application in another country, it is possible to assert the priority of the primary application. The patent filed subsequently is then considered to have been filed on the day of the primary application. The possibility to claim such priorities is based on the Paris Convention that most countries are members of. This means that within a year from the date of the first application a subsequent application can be effected guaranteeing its priority.

The examination procedure ends when a test certificate is issued, or possibly with the refusal to issue a patent. In case of granting a patent, it is published in the patent journal and entered in the patent registry.

How can action be taken against a patent – opposition/nullity proceedings?

Everyone can oppose a patent granted within a period of three months from its announcement in the patent journal at a low cost. The opposition is formally required to be presented in the written form and can be stated when at least one of the opposition grounds enumerated under § 21 of the Patents Act exists. These grounds should be stated in detail and factual claims should be presented comprehensively by means of reference, which include one of the revocation grounds under § 21 of the Patents Act (e.g. lack of patentability, insufficient disclosure, unlawful withdrawal or impermissible extension). It is further to be examined if the opposition should be against the whole main patent claim with all subordinate claims, since the patent holder is likely to consider the possibility of splitting the patent up in the opposition proceedings in accordance with § 60 of the Patents Act.

A department of the Patent Office consisting of a chairperson and two associate judges rules over an opposition. It is possible to appeal to the Federal Patent Tribunal for the examination of this ruling or even to appeal to the Federal High Court of Justice on points of law. After a three months’ period everyone can oppose a patent by filing a nullity suit against the formal owner of the patent at the Federal Patent Tribunal for a fee. The Patent Appeal Court is responsible for the nullity suit and typically consists of two legal experts and three experts on technical matters.

The nullity suit – contrary to the opposition proceedings – is expensive. An appeal can be lodged to the Federal High Court of Justice from the judgement of the Federal Patent Tribunal.

Is there a European patent?

There is an agreement on Community patents from 1989 but it has not been ratified yet. Therefore, there is no standardised European Community Patent, similar to the European Community Trademark, the registration of which in the European Trademark Office extends the protection over the whole of Europe without any national registrations being necessary).

However, on the basis of the European Patent Convention a standardised application to issue a European patent can be made to the European Patent Office. In this case, national issues, namely national laws, are to be partly applied e.g. in cases of infringement suits. This is so because a European patent acquires the same rights in each of the European countries designated in the application (it is not necessary to designate all countries) as it would acquire if it had obtained individual patents in each of these countries.

What do we need to register your invention?

Usually an outline, a description and possibly a model are necessary. In some cases, we need further details which we cannot state generally since they depend on the complexity of the given object.

In the initial phase, in which we plan further proceedings, we only need general information on the area in question (electrical engineering, mechanical engineering, chemistry, etc.) so that our expert in charge can contact you and settle further details with you, including estimation of costs.


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