Article 118 – Unity of the European patent application or European patent - The European Patent Convention, Convention on the Grant of European Patents – (European Patent Convention), Part VII – Common provisions, Chapter I – Common provisions governing procedure
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Where the applicants for or proprietors of a European patent are not the same in respect of different designated Contracting States, they shall be regarded as joint applicants or proprietors for the purposes of proceedings before the European Patent Office. The unity of the application or patent in these proceedings shall not be affected; in particular the text of the application or patent shall be uniform for all designated Contracting States, unless this Convention provides otherwise.