Top IPC subclasses
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1
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E04F
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2
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finishing work on buildings, e.g. stairs, floors
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2
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B05D
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2
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processes for applying liquids or other fluent materials to surfaces, in general
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3
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C04B
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2
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Lime; magnesia; slag; cements; compositions thereof, e.g. mortars, concrete or like building materials; artificial stone; ceramics; refractories; treatment of natural stone
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