The main contents of a trademark announcement include: announcement of preliminary examination and approval of a trademark, announcement of registration of a trademark, announcement of renewal of a registered trademark, announcement of transfer of a registered trademark, announcement of change of a registered trademark, announcement of cancellation of a registered trademark, announcement of registration of a trademark license contract and other announcements and notices deemed necessary by the Trademark Office. If you are talking about the announcement period of a registered trademark, it should be legally effective. The announcement of registered trademarks is an announcement issued by the Trademark Office of the State Administration for Industry and Commerce after the preliminary examination and approval of the announcement. After a three-month objection period, there is no objection or the objection cannot be established after the objection adjudication procedure. The purpose of the announcement is to inform the public that the trademark has been registered and that the applicant has obtained the exclusive right to use the trademark, and no one may infringe upon it. The announcement of a registered trademark is the legal evidence for the applicant to obtain the exclusive right to use a trademark.