If an application for trademark registration is challenged during the registration period, the following are some common countermeasures:

1. Understand the content of the objection: carefully study and understand the content and reasons of the objection raised by the objecting party. Understanding the other party's claim is helpful to evaluate the rationality of the objection and the extent to which it may affect trademark registration.

2. prepare response materials: prepare corresponding response materials according to the content of the objection. This may include putting forward rebuttal opinions against dissenters' views and providing evidence to support the legality of trademark registration applications.

3. submission of response documents: according to the regulations of the trademark office or the intellectual property office, submit the prepared response materials to relevant institutions. Ensure that the response documents are submitted on time and comply with the prescribed form and format requirements.

4. Participate in hearings or mediation: In some cases, the Trademark Office or the intellectual property office may arrange hearings or mediation meetings to further hear objections. If necessary, attend the hearing or mediation, and provide relevant evidence and defense opinions.

5. Seek professional legal advice: If you are confused about handling the objection procedure or need professional legal advice, you can seek the help of a professional trademark lawyer or intellectual property consultant. They can provide advice on legal procedures and strategies and handle objections on your behalf.

It should be noted that the objection procedure during trademark registration may vary from country to country, and the specific procedures and requirements may be different. It is suggested that in the face of objections, the local trademark office or intellectual property office should be consulted in time to understand the specific handling procedures and requirements, and corresponding actions should be taken according to the actual situation.

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