Rule 23 26

Certificate of exhibition

The applicant must, within four months of the filing of the European patent application, file the certificate referred to in Article 55, paragraph 2, issued at the exhibition by the authority responsible for the protection of industrial property at that exhibition, and stating that the invention was in fact exhibited there. This certificate shall also state the opening date of the exhibition and, where the first disclosure of the invention did not coincide with the opening date of the exhibition, the date of the first disclosure. This certificate must be accompanied by an identification of the invention, duly authenticated by the above-mentioned authority.