Answer: A, B, D, E
Patent documents are written in accordance with the format requirements and content requirements stipulated by patent laws around the world, and specifically record the specific technology used to apply for a patent. Program documentation. As a record of scientific and technological knowledge, patent documents contain rich information resources. No matter which country the patent document comes from, the patent title, patent applicant, patent classification number, patent inventor, age of invention (priority time) and patent specification abstract must be marked on the title page of the patent specification. Statistics on these standardized data items can reflect the output of technological activities and intellectual property protection strategies of each country or patentee in different periods and fields.