Top IPC subclasses
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1
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G01R
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4
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Measuring electric variables; measuring magnetic variables
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2
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G09F
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2
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displayingadvertisingsignslabels or name-platesseals
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3
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G08B
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2
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signalling or calling systemsorder telegraphsalarm systems
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4
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F24H
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2
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fluid heaters, e.g. water or air heaters, having heat-generating means, in general
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5
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G07C
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2
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time or attendance registersregistering or indicating the working of machinesgenerating random numbe
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6
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G01D
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2
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measuring not specially adapted for a specific variablearrangements for measuring two or more variab
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7
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H05B
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1
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electric heatingelectric lighting not otherwise provided for
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8
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B65D
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1
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Containers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers; accessories, closures, or fittings therefor; packaging elements; packages
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