Rule 138 – Different claims, description and drawings for different States - The European Patent Convention, Implementing Regulations – to the Convention on the Grant of European Patents, Part VII – Implementing Regulations to Part VII of the Convention, Chapter VI – Amendments and corrections
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If the European Patent Office is informed of the existence of a prior right under Article 139, paragraph 2, the European patent application or European patent may, for such State or States, contain claims and, where appropriate, a description and drawings which are different from those for the other designated States.