Can patent citations come from examiners?

Of course. Patent citation can be provided by the patent inventor before the application, and can also be supplemented by Patent examiners in the examination process. It is a whole statistical data, and there is no distinction between the citations of patent applicants and those of Patent examiners, so patent citations can come from examiners. Patent citation refers to the remaining documents related to this patent application listed in patent documents, such as patent documents and non-patent documents such as scientific journals, papers, works and conference documents. Patent retrieval of patent application is beneficial to technology transfer.