When the Trademark Office takes the initiative to cancel a registered trademark ex officio. A trademark revocation review application refers to when the Trademark Office takes the initiative to cancel a registered trademark ex officio or makes a decision on a revocation request for a trademark that has not been used for three consecutive years. If the party is dissatisfied with the decision, he or she may apply to the Trademark Review and Adjudication Board for reexamination, and the Trademark Review and Adjudication Board will Trial and adjudication of cases.