Article 11

1. A trade mark may not be declared invalid on the ground that there is an earlier conflicting trade mark if the latter does not fulfil the requirements of use set out in Article 10(1) and (2), or in Article 10(3), as the case may be.

2. Any Member State may provide that registration of a trade mark may not be refused on the ground that there is an earlier conflicting trade mark if the latter does not fulfil the requirements of use set out in Article 10(1) and (2) or in Article 10(3), as the case may be.

3. Without prejudice to the application of Article 12, where a counter-claim for revocation is made, any Member State may provide that a trade mark may not be successfully invoked in infringement proceedings if it is established as a result of a plea that the trade mark could be revoked pursuant to Article 12(1).

4. If the earlier trade mark has been used in relation to part only of the goods or services for which it is registered, it shall, for purposes of applying paragraphs 1, 2 and 3, be deemed to be registered in respect only of that part of the goods or services.