WhatsApp is an immensely popular program for sharing messages, photos, etc. with friends or groups. Whats up with WhatsApp? Well, WhatsApp is not so happy with the trademark WhosApp. Whose app? WhoseApp of the German company WhoseApp. WhosApp is however not yet in use. The specification gives a hint of software/app for tracking products. Anyway, WhatsApp files an opposition with the EUIPO.
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