Trademark registrants can entrust others to act as agents for trademark matters by authorizing others to use their trademarks. The following are several common ways for trademark registrants to authorize others:

1. Power of attorney: The trademark registrant can write and sign a power of attorney to clearly authorize a specific individual or institution to act as agent for trademark matters. . The power of attorney should contain clear authorization scope, term, powers and obligations, etc., and should be signed and sealed by both parties.

2. Lawyer entrustment: Trademark registrants can entrust a professional trademark lawyer to represent them in trademark matters. As the legal representative of the registrant, a trademark lawyer can represent the registrant in trademark applications, changes, rights protection and other related matters.

3. Entrustment by a trademark agency: Trademark registrants can entrust a trademark agency to act for trademark matters. A trademark agency is an organization that specializes in trademark agency services and can handle trademark registration, changes, rights protection and other matters on behalf of registrants.

4. Internal authorization: Within some organizations or companies, the trademark registrant can authorize internal employees or departments to handle trademark affairs. This authorization is typically specified in internal authorization documents or bylaws and is signed and approved by the registrant or authorized person of the organization.

When authorizing others to act as agents for trademark matters, the trademark registrant should ensure that the authorization letter or entrustment relationship is clear and legal, and establish good communication and cooperation with the authorized person. In addition, the trademark registrant still retains ownership and control of the trademark, and is responsible for supervising and holding accountable the authorized person's actions and agency results.

Please note that specific trademark authorization methods and requirements may vary by country/region and specific circumstances. Therefore, before proceeding with trademark authorization, it is best to refer to relevant laws and regulations, the provisions of the trademark registration agency, or consult a professional trademark lawyer or agency to ensure compliance with applicable legal procedures and requirements.

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