Top IPC subclasses
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1
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H02K
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8
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dynamo-electric machines
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|
2
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B23P
|
5
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other working of metalcombined operationsuniversal machine tools
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3
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H01F
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2
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magnetsinductancestransformersselection of materials for their magnetic properties
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4
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H02G
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2
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installation of electric cables or lines, or of combined optical and electric cables or lines
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5
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H02J
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2
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circuit arrangements or systems for supplying or distributing electric powersystems for storing elec
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6
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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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7
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B23K
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1
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soldering or unsolderingweldingcladding or plating by soldering or weldingcutting by applying heat l
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