Top IPC subclasses
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1
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H01L
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4
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Semiconductor devices; electric solid state devices not otherwise provided for
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|
2
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C01G
|
3
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Compounds containing metals not covered by subclasses C01D or C01F
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3
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C30B
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3
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single-crystal growthunidirectional solidification of eutectic material or unidirectional demixing o
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4
|
G01N
|
2
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Investigating or analysing materials by determining their chemical or physical properties
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5
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B28D
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1
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working stone or stone-like materials
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6
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G01R
|
1
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Measuring electric variables; measuring magnetic variables
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