The meaning of patent document suffix

IPC arranges the knowledge of the whole technical field related to invention patents in descending order according to the hierarchical structure, and divides it into eight sections (A, B, C, D, E, F, G, H), that is, eight volumes.

A: Human necessities.

B: Operation, transportation (execution of operation)

C: chemistry, metallurgy.

D: Textile and papermaking (Textile &; Paper)

E: fixed structure

F: mechanical engineering, lighting, heating, weapons, blasting (machinery

Engineering, lighting, heating, weapons, blasting)

G: physics (physics)

H: electricity

These include:

D textiles; make paper

D0 1 natural or artificial thread or fiber; Spin or spin

D02 yarn; Mechanical processing of yarn or rope; Warp bending or winding

D03 weaving

D04 weaving; Lace making; Knitting; Ribbon; Nonwovens

D05 sewing; Embroidery; Tufted wool

D06 fabric processing; Washing; Flexible materials that do not fall into other categories.

D07 rope; Cables other than cables

D2 1 papermaking; Cellulose production

D99 Technical topics not included in other categories in this part.

/IPC/Parent/D