Top IPC subclasses
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1
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C10M
|
10
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lubricating compositionsuse of chemical substances either alone or as lubricating ingredients in a l
|
|
2
|
F16H
|
8
|
gearing
|
|
3
|
B23F
|
4
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making gears or toothed racks
|
|
4
|
C10N
|
2
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indexing scheme associated with subclass
|
|
5
|
C23C
|
2
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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
|
|
6
|
B24B
|
1
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machines, devices, or processes for grinding or polishingdressing or conditioning of abrading surfac
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