Top IPC subclasses
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1
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B23F
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15
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making gears or toothed racks
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|
2
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B24B
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15
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machines, devices, or processes for grinding or polishingdressing or conditioning of abrading surfac
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3
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F16H
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12
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gearing
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|
4
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C10M
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10
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lubricating compositionsuse of chemical substances either alone or as lubricating ingredients in a l
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5
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C03B
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8
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manufacture, shaping, or supplementary processes
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6
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B24D
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7
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tools for grinding, buffing, or sharpening
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7
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B22F
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7
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working metallic powdermanufacture of articles from metallic powdermaking metallic powder
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|
8
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B23B
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6
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turningboring
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9
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B23H
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6
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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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|
10
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C23C
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4
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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
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|
11
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B21H
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3
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making particular metal objects by rolling, e.g. screws, wheels, rings, barrels, balls
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12
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C21D
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3
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modifying the physical structure of ferrous metalsgeneral devices for heat treatment of ferrous or n
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|
13
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C10N
|
2
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indexing scheme associated with subclass
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|
14
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B30B
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2
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presses in generalpresses not otherwise provided for
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|
15
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B21K
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2
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making forged or pressed products, e.g. horse-shoes, rivets, bolts, wheels
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16
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A46B
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1
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brushes
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|
17
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B21J
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1
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forginghammeringpressingrivetingforge furnaces
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|
18
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F16K
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1
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valvestapscocksactuating-floatsdevices for venting or aerating
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|
19
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G01F
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1
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measuring volume, volume flow, mass flow, or liquid levelmetering by volume
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|
20
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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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