Top IPC subclasses
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1
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E04B
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4
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General building constructions; walls, e.g. partitions; roofs; floors; ceilings; insulation or other protection of buildings
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2
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B28B
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3
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shaping clay or other ceramic compositions, slag or mixtures containing cementitious material, e.g.
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3
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B28C
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2
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preparing clayproducing mixtures containing clay or cementitious material, e.g. plaster
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4
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E04C
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1
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Structural elements; building materials
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5
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C04B
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1
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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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