What is the structure of the Cooperative Patent Classification (CPC) scheme?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-27 5 Rules 4 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) scheme has a hierarchical structure consisting of multiple levels. According to MPEP 905.01 , the CPC structure is as follows: Section : The highest level, designated by a letter from A to H and Y Class : A two-digit number Subclass : A letter Group : A one to three-digit number Main Group and Subgroup : Separated by a forward slash (/) For example, in the CPC symbol A01B 1/02: A = Section (Agriculture) 01 = Class B = Subclass 1/02 = Group/Subgroup This hierarchical structure allows for precise classification of patent documents and efficient searching within specific technological areas. Related Rules from the Manual of Patent Examining Procedure 5 rules Collapse Highest Level of CPC Classification Is Section MPEP 905.01 Subject Matter Arranged Hierarchically MPEP 905.01 Each Section Divided Into Classes MPEP 905.01 Classes Must Be Subdivided into Subclasses MPEP 905.01 Each Subclass Is Divided Into Groups MPEP 905.01 Other Related FAQs 4 FAQs Collapse What is the CPC classification system and how is it structured? How are CPC sections designated and what do they represent? How are CPC symbols used in patent documents? What is the Y section in the CPC scheme?