Top IPC subclasses
|
1
|
C10M
|
4
|
lubricating compositionsuse of chemical substances either alone or as lubricating ingredients in a l
|
|
2
|
C23C
|
2
|
Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general
|
|
3
|
C10N
|
1
|
indexing scheme associated with subclass
|
|
4
|
B21J
|
1
|
forginghammeringpressingrivetingforge furnaces
|
|
5
|
B21K
|
1
|
making forged or pressed products, e.g. horse-shoes, rivets, bolts, wheels
|