Top IPC subclasses
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1
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F16H
|
18
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gearing
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|
2
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F03B
|
5
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machines or engines for liquids
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|
3
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B23H
|
3
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Working of metal by the action of a high concentration of electric current on a workpiece using an electrode which takes the place of a tool; such working combined with other forms of working of metal
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|
4
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F03D
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2
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Wind motors
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5
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B23F
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2
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making gears or toothed racks
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|
6
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G01F
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2
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measuring volume, volume flow, mass flow, or liquid levelmetering by volume
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|
7
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F22B
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1
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methods of steam generationsteam boilers
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|
8
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F04B
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1
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positive-displacement machines for liquidspumps
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|
9
|
G01N
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1
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Investigating or analysing materials by determining their chemical or physical properties
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|
10
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G01L
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1
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measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure
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|
11
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B24B
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1
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machines, devices, or processes for grinding or polishingdressing or conditioning of abrading surfac
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