Posts tagged trademark
Can one act after years against use of a later registered trademark?

The owner of an older trademark can have a later registered conflicting trademark declared invalid. The registration of the younger trademark does not function as some kind of approval allowing for undisturbed use of this younger trademark: the older trademark owner can still take action against it after the younger trademark has been registered. But the older trademark owner should not wait indefinitely. If he becomes aware of the younger registration and the use, he has five years to act against the younger trademark registration or the infringing use. Is sending a letter sufficient as an action?

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