The following are three situations that cannot be registered as a trademark:

1. Universal descriptors or characters: One of the situations that cannot be registered as a trademark refers to universal descriptors or characters. These are common words, graphics, or symbols used to generally describe goods or services that lack sufficient distinctiveness and distinction. A trademark needs to be distinctive so that consumers can distinguish it from other trademarks.

2. Conflict with existing trademarks: Trademark registration applications will also be rejected if the applied for trademark is similar to an existing trademark or is likely to cause confusion. The trademark registration agency will conduct a trademark search and comparison to determine whether there is any similarity to an existing trademark.

3. Violation of public ethics or legal provisions: Trademark registration applications will be rejected if the applied trademark is considered to violate public ethics or legal provisions. This may include trademarks that involve objectionable, deceptive or illegal conduct, or that infringe the intellectual property rights or rights of others.

Please note that different countries or regions may have different regulations and standards for trademark registration. Trademark registration authorities will evaluate the compliance of trademark registration applications in accordance with their respective laws and regulations. Therefore, before applying for trademark registration, it is recommended that you carefully study the trademark laws and regulations of the target country or region to ensure that your trademark meets the registration requirements.

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