You can call 010-63218500 for consultation and provide the trademark registration number. If the certificate is sent to the agency, it will be recorded by the Trademark Office. If it is returned to the Trademark Office, it can also be checked by the Trademark Office. . However, after such a long time, it is probably more difficult. The best case scenario is to return it to the Trademark Office. If it is with an agency, the company is no longer there, and the certificate is probably gone. In addition, corrections are also very fast now. You can’t get them in 15 days, but they come out in more than a month