Step one: Enter the US trademark search website, select the second option, select structured search, and click to enter. \r\nStep 2: Enter the trademark to be queried in the "Search word" column, select BasicIndex in the query column, then enter the international classification number in the "Search word" column, such as 009 (must enter 3 digits), select InternationalClass, use "AND" to associate two conditions. \r\nIf you want to query two keywords containing spaces in the same category, you can use "and" to associate the two keywords, for example: "B" and "helmet"\r\nStep 3 : Click "SubmitQuery" to submit the query and get the search results. \r\nFor more information on how to query US trademarks, enter: /ask/a3aad51615833146.html?zd to view more content