Trademark certificates can be displayed by searching the official trademark database or contacting the Trademark Office.

To display a trademark certificate, you can search for trademarks by visiting the official website of the National Trademark Office or other trademark databases, such as WIPO's global trademark database. On the query page, you can enter relevant information such as the trademark registration number or trademark name to obtain the detailed information and certificate image of the trademark certificate. Moreover, you can also directly contact the National Trademark Office or the trademark registration agency and request a copy of the trademark certificate or supporting documents from them.