Legal analysis: The effective time for the transfer of trademark rights is the date marked on the "Certificate of Approval of Transfer of Registered Trademark". The Trademark Office will issue a "Certificate of Approval of Transfer of Registered Trademark" within fifteen days after receiving the transfer application. You can receive the "Certificate of Approval of Transfer of Registered Trademark" three to four months from the date of establishment of the application. This certificate must be used together with the original "Trademark Registration Certificate". The date marked on the "Certificate of Approval of Transfer of Registered Trademark" is the effective date of transfer registration.

Legal basis: "Trademark Law of the People's Republic of China" Article 42: If a registered trademark is transferred, the transferor and the transferee shall sign a transfer agreement and submit the same request to the Trademark Office Make an application. The transferee shall ensure the quality of the goods using the registered trademark. When transferring a registered trademark, the trademark registrant shall transfer all similar trademarks registered on the same goods, or identical or similar trademarks registered on similar goods. For transfers that are likely to cause confusion or have other adverse effects, the Trademark Office will not approve the transfer and will notify the applicant in writing and explain the reasons. After the transfer of a registered trademark is approved, it will be announced. The assignee shall enjoy the exclusive right to use the trademark from the date of announcement.