Legal analysis: There is no official fee for handling objection defense, only the service fee of the entrusted agent. The service fee for the general defense is about 2500-3500, depending on the difficulty of the case. If you do not entrust the defense, It is free for agencies to defend themselves. But the effect may not be good. If you think this trademark is important, it is best to entrust an agency, because it involves many legal factors and defense skills, and the cost is usually several thousand yuan.

Legal basis: "Trademark Law of the People's Republic of China" Article 44 If a registered trademark violates the provisions of Articles 10, 11 and 12 of this Law, Or if the registration is obtained by deception or other improper means, the Trademark Office shall declare the registered trademark invalid; other units or individuals may request the Trademark Review and Adjudication Board to declare the registered trademark invalid. When the Trademark Office makes a decision to declare a registered trademark invalid, it shall notify the parties concerned in writing. If the party concerned is dissatisfied with the decision of the Trademark Office, he may apply to the Trademark Review and Adjudication Board for review within fifteen days from the date of receipt of the notice. The Trademark Review and Adjudication Board shall make a decision within nine months from the date of receipt of the application and notify the parties in writing. If there are special circumstances that require an extension, it can be extended for three months with the approval of the industrial and commercial administration department of the State Council. If the party concerned is dissatisfied with the decision of the Trademark Review and Adjudication Board, it may file a lawsuit with the People's Court within thirty days from the date of receipt of the notice.