Top IPC subclasses
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1
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G03G
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10
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Electrography; electrophotography; magnetography
|
|
2
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G03C
|
10
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photosensitive materials for photographic purposesphotographic processes, e.g. cine, x-ray, colour,
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|
3
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G02B
|
6
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optical elements, systems, or apparatus
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4
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G08B
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5
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signalling or calling systemsorder telegraphsalarm systems
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|
5
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C01G
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5
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Compounds containing metals not covered by subclasses C01D or C01F
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|
6
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C07C
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4
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Acyclic or carbocyclic compounds
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|
7
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C08L
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4
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Compositions of macromolecular compounds
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|
8
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H01L
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4
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Semiconductor devices; electric solid state devices not otherwise provided for
|
|
9
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C01B
|
3
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non-metallic elementscompounds thereof
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|
10
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C08F
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3
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macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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|
11
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C23F
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3
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non-mechanical removal of metallic material from surfacesinhibiting corrosion of metallic materialin
|
|
12
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C09K
|
3
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materials for applications not otherwise provided forapplications of materials not otherwise provide
|
|
13
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B82Y
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3
|
|
|
14
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G01T
|
2
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measurement of nuclear or x-radiation
|
|
15
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G11B
|
2
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information storage based on relative movement between record carrier and transducer
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|
16
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C30B
|
2
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single-crystal growthunidirectional solidification of eutectic material or unidirectional demixing o
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|
17
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C08G
|
2
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macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsatu
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|
18
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G01J
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2
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measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics o
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|
19
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G01B
|
2
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measuring length, thickness, or similar linear dimensionsmeasuring anglesmeasuring areasmeasuring ir
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|
20
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C23C
|
2
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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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