The trademark registration certificate number can usually be found in the upper right or upper left corner of the trademark registration certificate. The exact location may vary between different trademark registries or countries. The following are the common locations of trademark registration certificate numbers:

1. Upper right corner: The trademark registration certificate number is usually located in the upper right corner of the trademark registration certificate.

2. Upper left corner: Some trademark registration certificates place the trademark registration number in the upper left corner.

3. Header or footer: The trademark registration certificate number may sometimes be located in the header or footer of the trademark registration certificate.

Please note that the trademark registration number may consist of letters and numbers, and the specific format may also vary by country and region. The length and style of the trademark registration certificate number may also vary between different trademark registration agencies.

If you need to find the location of a specific trademark registration certificate number or understand the requirements of a specific trademark registration agency, you can refer to the agency's official website or contact their customer service department to obtain accurate information.

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