What patents in the United States can be retrieved from appft pants of the United States Patent and Trademark Office?

Hello, I would like to ask which patents in the United States can be retrieved from the appft sub-library of the US Patent and Trademark Office? Appft sub-database of the US Patent and Trademark Office can search American invention patents, appearance patents, plant patents and so on. Appft sub-database is a patent application database published by the US Patent and Trademark Office, which can query many patents including invention patents, appearance patents and plant patents. Just open the AppFT page and use the confirmed CPC classification to search in the authorization database. The word patent comes from Latin Litteraepatentes, which means open letters or open documents. It is a certificate used by medieval monarchs to issue certain privileges, and later refers to the exclusive right certificate signed by the British king himself.