Top IPC subclasses
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1
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G09B
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2
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educational or demonstration appliancesappliances for teaching, or communicating with, the blind, de
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2
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E04B
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2
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General building constructions; walls, e.g. partitions; roofs; floors; ceilings; insulation or other protection of buildings
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3
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E04H
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1
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buildings or like structures for particular purposesswimming or splash baths or poolsmastsfencingten
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