Top IPC subclasses
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1
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G01R
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7
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Measuring electric variables; measuring magnetic variables
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2
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H01L
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7
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Semiconductor devices; electric solid state devices not otherwise provided for
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3
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C01G
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5
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Compounds containing metals not covered by subclasses C01D or C01F
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4
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G01N
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5
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Investigating or analysing materials by determining their chemical or physical properties
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5
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H05H
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4
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plasma techniqueproduction of accelerated electrically- charged particles or of neutronsproduction o
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6
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C01B
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3
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non-metallic elementscompounds thereof
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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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A01G
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2
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Horticulture; cultivation of vegetables, flowers, rice, fruit, vines, hops, or seaweed; forestry; watering
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9
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H01C
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1
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resistors
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10
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E01H
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1
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street cleaningcleaning of permanent wayscleaning beachescleaning landdispersing fog in general
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11
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H01B
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1
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cablesconductorsinsulatorsselection of materials for their conductive, insulating, or dielectric pro
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12
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G01J
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1
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measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics o
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13
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G01B
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1
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measuring length, thickness, or similar linear dimensionsmeasuring anglesmeasuring areasmeasuring ir
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14
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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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