Of course, the protection of production, manufacture, sale and use of patent protection knowledge, as well as academic quotations and comments, certainly do not belong to the aforementioned protection category.

Patent application documents generally need to describe the current situation of the existing technology in the "background technology" part, point out the existing technical problems, and put forward the purpose of the invention on this basis, so it is generally necessary to quote documents when writing this part, and of course it is not excluded to quote in other parts.

If you cite a document in a patent document, write the cited document directly in the text.