1, part a-human life needs
2. part b-homework; transport
3. part c-chemistry; metallurgy
4. part d-textiles; make paper
5. Part E-Fixed buildings
6. Part F-Mechanical Engineering; Lighting; Heating; Weapons; explosion
7. Part G-Physics
8. Part H-Electricity
The International Patent Classification (IPC) established by Strasbourg Agreement provides a classification system composed of symbols independent of language, which is used to classify patents and utility models according to their different technical fields.
Extended data:
IPC classifies technologies into 8 categories, with more than 70,000 classifications. Each compound classification has a classification number consisting of Arabic numerals and Latin letters.
In order to reflect the latest situation, IPC should be constantly revised and new versions should be released regularly. More than one million patent documents are published every year, and each patent document should be marked with an appropriate IPC classification number. The IPC classification number is assigned by the industrial property office of the country or region where the patent document is published. For PCT files, the IPC classification number is specified by the International Retrieval Unit (ISA).
Website of Shenzhen Science and Technology Innovation Committee-International Patent Classification Table