under normal circumstances, if you want to check whether your trademark has been registered, or if you want to check the information of your registered trademark, you may be unprofessional and inexperienced, so you can't find the specific information online. In fact, there are several ways to inquire about trademarks. 1. Log in to the Trademark Office. Click "Trademark Inquiry" on columns page to go in. 2, 2, enter the trademark office official website, there will be a disclaimer, click "I accept", pay attention to use ie kernel browser, other browsers may have problems. 3, 3, after going in, there is a trademark query page, including trademark approximate query, trademark comprehensive query, trademark status query, etc., which is generally "approximate query". 4, 4, query trademark can be registered successfully, we choose the trademark approximate query. Clicking on it will let you fill in some basic information of the query. Pay attention to the classification of trademarks. Trademarks are classified protection, with a total of ***45 categories. If you want to know which category your products belong to, you can click on the trademark classification help at the back. 5, 5, click on the trademark classification help, there will be a trademark classification table, find your own trademark classification. 6, 6, fill in the query content, choose Chinese characters, numbers, pinyin, English, etc. according to the situation, check all categories for the query type, and choose automatic query. 7. After clicking Query, a trademark similar to this kind of trademark will appear. If they are exactly the same and very similar, the registration will definitely fail. 8. Click on the trademark registration number to view the trademark details.