41As regards individual marks, the essential function is to guarantee the identity of origin of the marked goods or services to the consumer or end user by enabling him, without any possibility of confusion, to distinguish the goods or services from others which have another origin. For the trade mark to be able to fulfil its essential role in the system of undistorted competition which the Treaty seeks to establish and maintain, it must offer a guarantee that all the goods or services bearing it have been manufactured or supplied under the control of a single undertaking which is responsible for their quality (see, inter alia, judgments of 29 September 1998, Canon, C‑39/97, EU:C:1998:442, paragraph 28; of 12 November 2002, Arsenal Football Club, C‑206/01, EU:C:2002:651, paragraph 48; and of 6 March 2014, Backaldrin Österreich The Kornspitz Company, C‑409/12, EU:C:2014:130, paragraph 20).
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