Article 70 45
(1) The text of a European patent application or a European patent in the language of the proceedings shall be the authentic text in any proceedings before the European Patent Office and in any Contracting State.
(2) However, in the case referred to in Article 14, paragraph 2, the original text shall, in proceedings before the European Patent Office, constitute the basis for determining whether the subject-matter of the application or patent extends beyond the content of the application as filed.
(3) Any Contracting State may provide that a translation, as provided for in this Convention, in an official language of that State, shall in that State be regarded as authentic, except for revocation proceedings, in the event of the application or patent in the language of the translation conferring protection which is narrower than that conferred by it in the language of the proceedings.
(4) Any Contracting State which adopts a provision under paragraph 3:
(a) must allow the applicant for or proprietor of the patent to file a corrected translation of the European patent application or European patent. Such corrected translation shall not have any legal effect until any conditions established by the Contracting State under Article 65, paragraph 2, and Article 67, paragraph 3, have been complied with mutatis mutandis;
(b) may prescribe that any person who, in that State, in good faith is using or has made effective and serious preparations for using an invention the use of which would not constitute infringement of the application or patent in the original translation may, after the corrected translation takes effect, continue such use in the course of his business or for the needs thereof without payment.
45 See Legal advice No. 17/90 (Annex II).
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