Italian clothing company Diesel SpA disputed the right to use the trademark, ‘Diesel’ by Irish company Montex Holdings Ltd in a long-running case.
The Italian company sold jeans and other items in Ireland since 1982. The Irish company Montex’s predecessor had used this trademark since 1979, and in September 1992, Montex applied to the Controller of Patents, Designs and Trademarks to register the word ‘Diesel’ for their jeans.
Diesel raised their objection to Montex in January 1994 and sought to register the name Diesel for their own company. They claimed that there would be confusion in the market if Montex had the use of the same name.
In 1998, Montex’s application was declined as it had failed to establish that there was no likelihood of deception or confusion with Diesel’s offerings, thus failing to meet the requirements of the Trademarks Act 1963.
Montex appealed to the High Court but failed. They failed again in the Supreme Court. But in 2013, the Controller upheld Montex’s opposition to Diesel’s trademark applications. The Controller ruled that Diesel was not the proprietor of the trademark and that there would be confusion if Diesel’s mark was allowed on the register.
Diesel appealed this ruling to the High Court where it was successful. The High Court judge found that Diesel was the proprietor of the marks accepting that confusion would arise if Montex also appeared on the register as owner of the same mark.
Montex appealed against the High Court’s decision to the Court of Appeal. They based their appeal on a number of points including that the issue of proprietorship was res judicata (the matter cannot be raised again) having regard to the earlier decisions of the High Court and the Supreme Court. They also submitted that the High Court erred in finding that the issue of Montex’s bona fide use of the trademark was not conclusively decided in the earlier proceedings and erred in allowing new evidence on that issue.
The Court of Appeal considered the judgments given previously in this case. In regard to the res judicata issue, this required the High Court judge to find that Montex was the proprietor of the mark, a matter which had been decided in Montex’s favour initially in the High Court and which had been accepted by the Supreme Court.
The Court of Appeal declined to consider further questions of alleged copying or wrongful conduct by Montex and the effect of same on Diesel’s application for registration on the basis that their determination was unnecessary, given that the Supreme Court had unequivocally concluded that confusion within the meaning of s.19 of the 1963 Act “prevents registration, irrespective of whether there is blameworthy conduct or not”.
The Court of Appeal determined that it was not open to the High Court to permit registration of Diesel’s mark on the basis of Montex’s conduct or blameworthiness, where same was irrelevant to the application of s.19.
Therefore, the Court of Appeal allowed the appeal of Montex.
Diesel SpA v The Controller of Patents, Designs and Trademarks and Montex Holdings Ltd [2025] IECA 211

