Top IPC subclasses
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1
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H01L
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3
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Semiconductor devices; electric solid state devices not otherwise provided for
|
|
2
|
C08L
|
2
|
Compositions of macromolecular compounds
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|
3
|
C01G
|
2
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Compounds containing metals not covered by subclasses C01D or C01F
|
|
4
|
C09K
|
2
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materials for applications not otherwise provided forapplications of materials not otherwise provide
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5
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C30B
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2
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single-crystal growthunidirectional solidification of eutectic material or unidirectional demixing o
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|
6
|
C01B
|
1
|
non-metallic elementscompounds thereof
|
|
7
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B82B
|
1
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nano-structuresmanufacture or treatment thereof
|
|
8
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F24J
|
1
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Production or use of heat not otherwise provided for
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