Beijing Wuyi International Intellectual Property Answer: Patent documents refer to the inventions for which patents have been applied for or approved, that is, the published or unpublished documents (or abstracts thereof) containing the findings, inventions, utility models and the research, design, development and test results of industrial designs that have been applied for or confirmed, as well as the relevant materials for protecting the rights of inventors, patentees and holders of industrial designs. These materials are documents produced in the process of patent approval, some of which are published publicly, and some are just for archiving or copying.
Patent documents as public publications mainly include: patent application specification, patent specification, utility model specification, industrial design specification, patent bulletin, patent index, etc.