Litigation

Mantaining trademark rights

Trademarks rights must be maintained through actual lawful use of the trademark.
These rights will cease if a mark is not actively used for a period of time, normally 5 years in most jurisdictions. In the case of a trademark registration, failure to actively use the mark in the lawful course of trade, or to enforce the registration in the event of infringement, may also expose the registration itself to become liable for an application for the removal from the register after a certain period of time on the grounds of "non-use".

It is not necessary for a trademark owner to take enforcement action against all infringement if it can be shown that the owner perceived the infringement to be minor and inconsequential.
This is designed to prevent owners from continually being tied up in litigation for fear of cancellation.
An owner can at any time commence action for infringement against a third party as long as it had not previously notified the third party of its discontent following third party use and then failed to take action within a reasonable period of time (called acquiescence).

The owner can always reserve the right to take legal action until a court decides that the third party had gained notoriety which the owner 'must' have been aware of. It will be for the third party to prove their use of the mark is substantial as it is the onus of a company using a mark to check they are not infringing previously registered rights. In the US, owing to the overwhelming number of unregistered rights, trademark applicants are advised to perform searches not just of the trademark register but of local business directories and relevant trade press.

Trademarkitaly.it perform such tasks prior to application.