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Article 147 Payments in respect of renewal fees for unitary patents
If the group of Contracting States has fixed a common scale of renewal fees in respect of European patents, the proportion referred to in Article 39, paragraph 1, shall be calculated on the basis of the common scale; the minimum amount referred to in Article 39, paragraph 1, shall apply to the unitary patent. Article 39, paragraphs 3 and Article 39, paragraphs 4, shall apply mutatis mutandis.