Refer to the following tutorial on how to identify patent classification.
Then, an advanced patent search screen is displayed. Next, click "ClsStack" button to open CLS Table.
The patent classification archive stores the saved patent classification. By clicking the green check mark on the left side of the stored patent classification, you can reflect the patent classification in the search formula.
Search condition was entered. Clicking the "Search" button created a patent search result.
Although it seems that search results are too large with the feeling of ordinary patent search, since patent integration has a powerful secondary search function, even if you create a large patent search result with primary search, there is no problem.
We narrow down the search result (secondary search) of the created patent search results by " Advanced Patent Search (Secondary Search)".