How to change the company's trademark address: The trademark registrant files a change application in person or by entrusting others to do so. If approved, the Trademark Office will approve the change in accordance with the law and issue a new registration certificate. If the name or address of the trademark registrant is changed, the trademark registrant shall change all registered trademarks together. If not, the Trademark Office will notify the trademark registrant to make corrections within a time limit.