Top IPC subclasses
|
1
|
C23F
|
136
|
non-mechanical removal of metallic material from surfacesinhibiting corrosion of metallic materialin
|
|
2
|
B23H
|
111
|
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
|
|
3
|
C07C
|
44
|
Acyclic or carbocyclic compounds
|
|
4
|
G06K
|
40
|
Recognition of data; presentation of data; record carriers; handling record carriers
|
|
5
|
C23C
|
29
|
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
|
C25F
|
17
|
processes for the electrolytic removal of materials from objectsapparatus therefor
|
|
7
|
C07F
|
12
|
acyclic, carbocyclic, or heterocyclic compounds containing elements other than carbon, hydrogen, hal
|
|
8
|
G01N
|
11
|
Investigating or analysing materials by determining their chemical or physical properties
|
|
9
|
B23K
|
9
|
soldering or unsolderingweldingcladding or plating by soldering or weldingcutting by applying heat l
|
|
10
|
C25D
|
8
|
processes for the electrolytic or electrophoretic production of coatingselectroformingjoining workpi
|
|
11
|
C22C
|
5
|
alloys
|
|
12
|
C07D
|
4
|
Heterocyclic compounds
|
|
13
|
C01B
|
4
|
non-metallic elementscompounds thereof
|
|
14
|
C01G
|
4
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
15
|
B41M
|
4
|
printing, duplicating, marking, or copying processescolour printing
|
|
16
|
C21D
|
3
|
modifying the physical structure of ferrous metalsgeneral devices for heat treatment of ferrous or n
|
|
17
|
C08H
|
1
|
derivatives of natural macromolecular compounds
|
|
18
|
C02F
|
1
|
Treatment of water, waste water, sewage, or sludge
|
|
19
|
F28F
|
1
|
details of heat-exchange or heat-transfer apparatus, of general application
|
|
20
|
F15C
|
1
|
fluid-circuit elements predominantly used for computing or control purposes
|