Top IPC subclasses
1
|
F16H
|
1
|
gearing
|
2
|
B23F
|
1
|
making gears or toothed racks
|
3
|
B24B
|
1
|
machines, devices, or processes for grinding or polishingdressing or conditioning of abrading surfac
|
4
|
B25B
|
1
|
tools or bench devices not otherwise provided for, for fastening, connecting, disengaging, or holdin
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