Generally speaking, it is enough for intermediate engineers to have two patents, but they still have to obey the requirements of their own unit's review documents.
In modern times, patents are generally documents issued by government agencies or regional organizations representing several countries according to their applications. This kind of document records the contents of the invention and creation, and in a certain period of time, it has produced such a legal state that the patented invention and creation can only be implemented by others with the permission of the patentee.