In a patent litigation case between Smart Trike Mnf Pte Ltd (a US American company) and Fábricas Agrupadas de Muñecas de Onil, SA (FAMOSA, the most well-known dolls manufacturer in Spain), the Civil Chamber of the Spanish Supreme Court in a 20 October 2023 decision has confirmed the need of filing Spanish translations of documents drafted in a foreign language with the initial brief of an invalidity action or counterclaim. Otherwise, the prior art drafted in a foreign language used in the invalidity attack will be ignored. It is not possible to correct this lack of translation after the party has filed a reply to the invalidity claim or counterclaim.
The case involved the infringement of a patent on toddlers’ tricycles held by the claimant. The defendant, FAMOSA, denied infringement and filed a counterclaim of invalidity of the patent based on prior art documents drafted in German and French. However, the defendant did not file the Spanish translation of those prior art documents in its counterclaim or together with the…