Top IPC subclasses
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1
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C01G
|
2
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Compounds containing metals not covered by subclasses C01D or C01F
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|
2
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H01C
|
1
|
resistors
|
|
3
|
C01B
|
1
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non-metallic elementscompounds thereof
|
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4
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C30B
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1
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single-crystal growthunidirectional solidification of eutectic material or unidirectional demixing o
|
|
5
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C01F
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1
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compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium
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|
6
|
G01K
|
1
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measuring temperaturemeasuring quantity of heatthermally-sensitive elements not otherwise provided f
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