How does the Cooperative Patent Classification (CPC) system work?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-27 4 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. The Cooperative Patent Classification (CPC) system is a joint classification system developed by the USPTO and the European Patent Office (EPO). It works as follows: Organizes technical content of patent documents into hierarchical categories Uses a combination of letters and numbers to represent different technology areas Allows for more precise and efficient prior art searches MPEP 902 states: “The CPC system is a hierarchical classification system, which is subdivided into sections, classes, subclasses, groups, and subgroups.” This structure enables patent examiners to narrow down their searches to specific technological fields, improving the accuracy and efficiency of prior art identification. Related Rules from the Manual of Patent Examining Procedure 4 rules Collapse Classification Orders Affect Existing Definitions MPEP 902.02 Recommended Examiner Definitions Must Be Updated Periodically MPEP 902.02 Recommended Classification Orders Available Online for USPTO Personnel MPEP 902.02 Classification Home Page Must Be Accessible via Toolkit MPEP 902.02 Other Related FAQs 5 FAQs Collapse How can patent examiners access the Classification Home Page? How can I access the Cooperative Patent Classification (CPC) system? What automated search tools are available to patent examiners? What is the purpose of the Cooperative Patent Classification (CPC) system? What are Definition Notes in the USPC?