40Accordingly, the answer to be given to the national court must be that Article 2 of the Directive is to be interpreted as meaning that the subject-matter of an application for trade mark registration, such as that lodged in the main proceedings, which relates to all the conceivable shapes of a transparent bin or collection chamber forming part of the external surface of a vacuum cleaner, is not a sign' within the meaning of that provision and therefore is not capable of constituting a trade mark within the meaning thereof.
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