I have been selling my brand named ‘Slimmy Slimmy’ on social media but I never do trade mark registration. One day, I received messages on social media asking me whether certain goods with the label ‘Slimmie Slimmie’ were mine. Upon conducting trade mark search, I discovered that the brand had been registered. What can I do?

What should be proven by the proprietor?

What ‘First-to-Use’ principle is?

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