Trademark registration numbers can be viewed in the following places:

1. Trademark registration bureau website: Trademark registration bureaus in different countries or regions usually have official websites. You can Search for trademark registration numbers on its website. Usually, an online trademark registration number query tool is provided on the website of the Trademark Registration Bureau, and you can enter relevant information to query.

2. Trademark database: The trademark registration offices of some countries or regions will provide an online trademark database. You can query it by entering the trademark name, applicant name and other information to obtain the trademark registration number.

3. Trademark registration certificate: The trademark registration number will be clearly stated on the trademark registration certificate. If you are the registrant of a trademark, you can check your trademark registration certificate to obtain the registration number.

4. Trademark agency: If you registered your trademark through a trademark agency, you can consult the agency, and they may provide information about the trademark registration number.

Please note that the search method for trademark registration numbers may vary by country or region. It is recommended to choose the corresponding query method according to the specific situation. For example, if your trademark is registered in China, you can query the website or trademark database of the State Intellectual Property Office of China.

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