1. Invalid declaration: In some cases, anyone can file an invalid declaration with the trademark registration authority and request the cancellation of trademark registration. The reasons for invalidation may include the violation of trademark law in trademark registration, the fraudulent behavior of the trademark owner during registration, and the conflict between trademark registration and existing rights.

2. Conflict statement: A trademark conflict statement refers to the cancellation request of a registered trademark made by other trademark owners. Conflict statements are usually based on the conflict between trademark registration and existing trademark rights, which may lead to confusion or misleading consumers.

3. Voluntary revocation: A trademark owner may voluntarily apply for cancellation of its trademark registration. This may be due to the abandonment of trademarks, trademark changes or other business strategies.

4. Court judgment: In the litigation of trademark infringement or other related legal disputes, the court may make a judgment to cancel the registration of relevant trademarks.

The specific procedures and requirements for revoking trademark registration may vary from country to country. Under specific circumstances, it is recommended to consult professional trademark agencies, lawyers or relevant intellectual property agencies to understand the applicable laws and procedures.

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