Add categories. A registered trademark has no categories and you can add categories. When registering a trademark and wanting to add categories to the trademark, you can only apply for registration of multiple categories. When the registration is completed, the applicant will have multiple registered trademarks of different categories. The "Trademark Registration Certificate" is a legal document issued by the Trademark Office to the trademark registrant in accordance with the relevant provisions of the "Trademark Law" to prove the scope of the exclusive right to use the trademark.