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