To check the trademark registration status, you can do so through the following channels:

1. Trademark Registration Office website: Each country or region has a corresponding trademark registration office, you can visit Its official website. On the website, you can conduct a trademark search and view registered trademark information.

2. Online trademark database: Some commercial institutions and intellectual property organizations provide online trademark databases, such as WIPO's Global Brand Database and the US Patent and Trademark Office's Trademark Electronic Search System. You can conduct trademark searches and queries in these databases.

3. Trademark database service providers: Some third-party companies provide trademark database access services. You can check trademark registration status through the platforms of these service providers. Some common trademark database service providers include Trademarkia, ThomsonCompuMark, etc.

4. Trademark attorney: If you hire a trademark attorney, they usually have privileged access to trademark registration information and can provide you with information related to trademark registration.

It should be noted that trademark registration information in different countries and regions may be stored in different databases. Therefore, when querying trademark registration, you need to choose the appropriate channel according to the country or region you are concerned about.

No matter which method you choose to search for trademark registration, it is recommended that you use the accurate trademark name, category or other relevant information to search to obtain more precise results.

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