After a trademark is registered, it is generally not allowed to directly modify the category of the trademark. Once a trademark is successfully registered, the scope and category of trademark rights will be fixed, and the Trademark Registration Office will issue a trademark registration certificate based on the category you selected when applying.

If you want to modify the category of your trademark, you may need to go through the process of trademark change or re-registration. The specific process and feasibility will be affected by national or regional regulations. Some countries or regions allow trademark changes, but certain conditions need to be met and fees may be involved.

When considering a change in trademark category, it is recommended to consult a professional intellectual property lawyer. They can provide you with detailed legal advice based on the specific situation to ensure that your trademark rights and interests are best protected.

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