If your trademark registration has been invalidated by someone else, you can take the following steps to deal with the situation:

1. Check the invalidation notice:

-Carefully Check the notification received to ensure that you understand the specific reasons and basis for the other party’s claim that the trademark registration is invalid.

- Review the notice for deadlines and related procedural requirements to ensure you can act in a timely manner.

2. Seek professional legal help:

-It is recommended that you seek the help of a professional intellectual property lawyer. They can provide you with legal advice and help you develop appropriate strategies and responses.

-The lawyer will evaluate the reasons and basis for the invalidation and provide you with advice based on relevant laws and evidence.

3. Prepare defense materials:

-According to the guidance of the lawyer, prepare necessary defense materials, including counterarguments, evidence and legal opinions.

-The defense materials should respond to and refute the invalid reasons raised by the other party one by one.

4. Participate in the invalidation procedure:

-Submit defense materials and relevant documents on time according to the requirements of the invalidation procedure.

-Participate in hearings, defense and other procedures within the procedural time limit to defend your rights and interests.

5. Consider litigation:

- If the dispute cannot be resolved through invalid proceedings, you may consider filing a lawsuit to submit the dispute to a court.

-Proceedings may vary from country to country, so please take appropriate action based on local legal requirements and the advice of an attorney.

Please note that the above steps are general recommendations and specific responses may vary depending on the situation. Therefore, it is recommended that you work with a professional intellectual property lawyer and develop a strategy that works for you based on your specific circumstances.

I wish you success in dealing with the invalidation of trademark registration!

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