Article 5(2) of the First Council Directive (89/104/EEC) of 21 December 1988 to approximate the laws of the Member States relating to trade marks is to be interpreted as meaning that, in order to enjoy protection extending to non-similar products or services, a registered trade mark must be known by a significant part of the public concerned by the products or services which it covers. In the Benelux territory, it is sufficient for the registered trade mark to be known by a significant part of the public concerned in a substantial part of that territory, which part may consist of a part of one of the countries composing that territory.