Blind trademark registration. Before applying for a trademark, you must check it on the trademark website to see if it has been registered. However, there is no trademark information about six months from the query time in the registered trademark database, so only trademark information about six months can be found in the trademark database, which is a blind spot for trademark query. Trademark registration follows the principle of "application first". If it is the same as or similar to a blind trademark, it shall be rejected.