Top IPC subclasses
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1
|
H01L
|
6
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Semiconductor devices; electric solid state devices not otherwise provided for
|
|
2
|
C01B
|
4
|
non-metallic elementscompounds thereof
|
|
3
|
B01F
|
4
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mixing, e.g. dissolving, emulsifying, dispersing
|
|
4
|
C30B
|
4
|
single-crystal growthunidirectional solidification of eutectic material or unidirectional demixing o
|
|
5
|
C02F
|
3
|
Treatment of water, waste water, sewage, or sludge
|
|
6
|
C25B
|
2
|
Electrolytic or electrophoretic processes for the production of compounds or non- metals; apparatus therefor
|
|
7
|
F24J
|
1
|
Production or use of heat not otherwise provided for
|
|
8
|
F25B
|
1
|
refrigeration machines, plants, or systemscombined heating and refrigeration systemsheat pump system
|
|
9
|
G21F
|
1
|
protection against x-radiation, gamma radiation, corpuscular radiation or particle bombardmenttreati
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