National patent bibliographic items refer to various information meticulously recorded and described within patent documents, which hold critical importance for understanding the content, scope, and associated technologies of patents.

  These bibliographic items constitute the information of patent literature, facilitating the storage, processing, and retrieval of patent information. For instance, relevant patent documents can be efficiently retrieved using elements such as patent application numbers, patent publication numbers, and invention titles. Patent bibliographic items form an essential component of patent application documents, comprising various types of information mandated by patent offices to streamline management, querying, and utilization of patent data. These items not only aid in organizing and retrieving patent literature but also serve as the foundation for patent protection and patent information management.

  To support related research, CnOpenData introduces Chinese National Patent Bibliographic Data. Patent bibliographic items typically encompass the following fields: Application Number, Application Date, CPC Classification Number, Applicant, Inventor, Abstract, Priority Data, among others.

Time Period

1985-2022 (can be updated as needed)

Field Display

Sample Data

Data Update Frequency

Annual Update