The examination unit for trademark registration is usually the national or regional trademark office or intellectual property office. The Trademark Office is the agency responsible for processing trademark registration applications and conducting trademark examinations.

The trademark registration systems in different countries and regions may be different, and the names of the examination units may also be different. For example, in the United States, the examination unit for trademark registration is the United States Patent and Trademark Office (USPTO); in China, the examination unit for trademark registration is the Trademark Office of the State Intellectual Property Office of China.

The trademark registration review unit is responsible for reviewing the compliance and registrability of trademark registration applications. They will review the trademark application, including evaluating the trademark's distinguishability, conflict with existing trademarks, and compliance with legal requirements. The examination unit will conduct an examination based on the trademark laws and relevant guidelines of each country or region, and ultimately decide whether to approve the trademark registration.

Please note that specific trademark review processes and standards may vary by country and region. It is recommended to consult the local trademark office or professional intellectual property agency to obtain accurate and up-to-date information when applying for trademark registration.

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