Top IPC subclasses
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1
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F16H
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13
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gearing
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2
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B64C
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4
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aeroplaneshelicopters
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3
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B64G
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1
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cosmonauticsvehicles or equipment therefor
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4
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B21J
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1
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forginghammeringpressingrivetingforge furnaces
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5
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F24J
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1
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Production or use of heat not otherwise provided for
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6
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G01F
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1
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measuring volume, volume flow, mass flow, or liquid levelmetering by volume
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7
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H01L
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1
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Semiconductor devices; electric solid state devices not otherwise provided for
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8
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B05C
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1
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apparatus for applying liquids or other fluent materials to surfaces, in general
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9
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B65B
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1
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machines, apparatus or devices for, or methods of, packaging articles or materialsunpacking
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10
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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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11
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B29C
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1
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shaping or joining of plasticsshaping of substances in a plastic state, in generalafter- treatment o
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