Xerography digital printing technology is one of the main technologies of digital printing. Among them, toner xerography technology plays an important role in the invention and development of xerography digital printing technology. In order to study the origin and development of toner xerography technology, from the social needs Departing, on behalf of patented technology and representative products, by search of US patents related to toner xerography technology from 1938 to 2019 on the "State Intellectual Property Office" patent search platform and the research on technology and product development history of the manufacture of toner xerography digital printing equipment manufacturers, on the basis of analyzing the technology of patented and representative products of toner xerography, summarized the development history of toner xerography digital printing technology.
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