Top IPC subclasses
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1
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H01L
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11
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Semiconductor devices; electric solid state devices not otherwise provided for
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|
2
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G01B
|
6
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measuring length, thickness, or similar linear dimensionsmeasuring anglesmeasuring areasmeasuring ir
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3
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G01R
|
5
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Measuring electric variables; measuring magnetic variables
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4
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G01N
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4
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Investigating or analysing materials by determining their chemical or physical properties
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5
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G02B
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1
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optical elements, systems, or apparatus
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6
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A61N
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1
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electrotherapymagnetotherapyradiation therapyultrasound therapy
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7
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H02M
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1
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apparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use wit
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8
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H01T
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1
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spark gapsovervoltage arresters using spark gapssparking plugscorona devicesgenerating ions to be in
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