Top IPC subclasses
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1
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G01R
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5
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Measuring electric variables; measuring magnetic variables
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2
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H02M
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4
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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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3
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H04B
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2
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transmission
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4
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H03M
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2
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coding, decoding or code conversion, in general
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5
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G05F
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2
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systems for regulating electric or magnetic variables
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6
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F02B
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2
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Internal-combustion piston engines; combustion engines in general
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7
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G01M
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2
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testing static or dynamic balance of machines or structurestesting structures or apparatus not other
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8
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H01C
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1
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resistors
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9
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G11C
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1
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static stores
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|
10
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C01B
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1
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non-metallic elementscompounds thereof
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|
11
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F42B
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1
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explosive charges, e.g. for blastingfireworksammunition
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12
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C01G
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1
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Compounds containing metals not covered by subclasses C01D or C01F
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|
13
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G01N
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1
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Investigating or analysing materials by determining their chemical or physical properties
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|
14
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H02J
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1
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circuit arrangements or systems for supplying or distributing electric powersystems for storing elec
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15
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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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16
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G01K
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1
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measuring temperaturemeasuring quantity of heatthermally-sensitive elements not otherwise provided f
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17
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A01G
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1
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Horticulture; cultivation of vegetables, flowers, rice, fruit, vines, hops, or seaweed; forestry; watering
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