Art. 74

Any person demonstrating an interest may bring an action to obtain a declaratory judgment on the existence or non-existence of a circumstance or legal relationship governed by this Act, in particular:

1. that a particular patent is valid;
2. that the defendant has performed an act referred to in Article 66;
3. that the plaintiff has not performed any act referred to in Article 66; 4.¹ that a particular patent is not enforceable against the plaintiff by virtue of a legal provision;
4. that with regard to two particular patents, the requirements of Article 36 for the grant of a licence are or are not fulfilled;
5. that the plaintiff has made the invention, which is the subject-matter of a particular patent application or patent; 7.² that a particular patent, which violates the double patenting prohibition, has become invalid.