Trademark registration inquiry can be conducted in the following ways:

1. Official website of trademark registration agencies: Trademark registration agencies in different countries and regions usually provide online inquiry systems. You can visit the official website and use the inquiry tools provided by them.

2. Trademark database: Some trademark databases will collect and provide query services for trademark registration information. These databases can be the databases of official trademark registration agencies, commercial organizations or third-party service providers.

3. Trademark information service providers: Some companies specialize in providing trademark-related information services, including trademark registration inquiries. You can visit the websites of these service providers and use their query tools to inquire about trademark registration.

4. local trademark registration office or office: if you want to obtain more specific trademark registration information or have special needs, you can go to the local trademark registration office or office in person to consult the staff and make inquiries.

please note that the specific ways to inquire about trademark registration will vary from country to country. It is recommended to visit the official website of the relevant trademark registration agency before making an inquiry, and consult the inquiry guide and instructions provided by it, so as to determine the most suitable inquiry way for your needs.

I hope the above answers are helpful to you. If you have any other questions, please feel free to ask.

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