(IPC)international patent classification

The patent is divided into 8 parts according to the IPC:
A=human necessities;        B=operation, transportation;
C=chemistry, metallurgy;    D=textile, papermaking;
E=fixed construction;          F=mechanical engineering, lighting, heating, weapon, blasting;
G=physics;                           H=electricity;
each part has its details
 

classification of technical field

The patent literature can be divided into the following according to the conventional field of technology:

Electronic information: electric equipment and electric engineering, audio-visual technology, communication technology, information technology
New material: fine organic chemistry, polymer chemistry and polymer, chemical engineering, surfacing and coating, material and Metallurgical Technology
Bio-medicine: biological technology, drug and cosmetics, agriculture, food
Process engineering: petroleum industry and base material chemistry, handling and printing, agriculture and food processing, machinery and equipment, material processing, textile and papermaking, environmental technology, mechanical device and transportation, consumer goods and civil engineering;
Mechanical device and transportation: machine tool, motor, pump, impeller, heat treatment and equipment, mechanical component, transportation, space technology and weapon;
Consumer goods and civil engineering: consumer goods and equipment, consumer goods and civil engineering, construction, mining;
others