National bibliographic item patents refer to various information meticulously recorded and described in patent documents, which hold critical significance for understanding patent content, scope, and related technologies.

  These bibliographic items constitute patent literature information, facilitating the storage, processing, and retrieval of patent documents. For instance, relevant patent literature can be efficiently retrieved through elements such as application numbers, publication numbers, and invention titles. Patent literature bibliographic items form essential components of patent application documents, prescribed by patent offices to standardize various information required in patent applications for effective management, querying, and utilization of patent information. 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 Bibliographic Item Patent Data. Patent bibliographic items typically encompass information in the following categories: Application Number (申请号), Application Date (申请日), CPC Classification (CPC分类号), Applicant (申请人), Inventor (发明人), Abstract (摘要), Priority Data (优先权数据), and other fields.

Time Span

1985-2022

Field Display

Sample Data

Data Update Frequency

Annual Update