Top IPC subclasses
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1
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B23H
|
61
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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
|
|
2
|
C23F
|
25
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non-mechanical removal of metallic material from surfacesinhibiting corrosion of metallic materialin
|
|
3
|
G06K
|
20
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Recognition of data; presentation of data; record carriers; handling record carriers
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|
4
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G01N
|
10
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Investigating or analysing materials by determining their chemical or physical properties
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|
5
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C25F
|
8
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processes for the electrolytic removal of materials from objectsapparatus therefor
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|
6
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B23K
|
7
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soldering or unsolderingweldingcladding or plating by soldering or weldingcutting by applying heat l
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|
7
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C07C
|
6
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Acyclic or carbocyclic compounds
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|
8
|
C23C
|
6
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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
|
|
9
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C07F
|
5
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acyclic, carbocyclic, or heterocyclic compounds containing elements other than carbon, hydrogen, hal
|
|
10
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C22C
|
4
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alloys
|
|
11
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B24D
|
3
|
tools for grinding, buffing, or sharpening
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|
12
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B41M
|
3
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printing, duplicating, marking, or copying processescolour printing
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|
13
|
C10M
|
3
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lubricating compositionsuse of chemical substances either alone or as lubricating ingredients in a l
|
|
14
|
H03K
|
2
|
pulse technique
|
|
15
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C01B
|
2
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non-metallic elementscompounds thereof
|
|
16
|
C10N
|
2
|
indexing scheme associated with subclass
|
|
17
|
G09F
|
2
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displayingadvertisingsignslabels or name-platesseals
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|
18
|
H02M
|
2
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apparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use wit
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|
19
|
C07D
|
1
|
Heterocyclic compounds
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|
20
|
C01G
|
1
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Compounds containing metals not covered by subclasses C01D or C01F
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