In order to identify patent classification, we first search for patents using appropriate keywords in Easy Patent Search (preliminary search).
Browse search results and check which patents are highly relevant to this patent search target.
When you find a highly relevant patent document, select the "CLS" tab.
Select the target patent classification and hierarchy and click the "Display" button. A list of patent classifications will then be displayed.
Normally, it will be trial and error many times to identify reasonable patent classification.
If you find the appropriate patent classification, click the "book" icon and save the patent classification to CLS Table.