62As for the appellant’s argument that since the Community trade mark has a unitary character, the assessment of acquisition by a mark of distinctive character through use cannot be based on individual national markets, it should be noted that, even if it is true, in accordance with the case-law recalled at paragraph 60 of this judgment, that the acquisition by a mark of distinctive character through use must be proved for the part of the European Union in which that mark did not, ab initio, have such character, it would be unreasonable to require proof of such acquisition for each individual Member State.
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