Top IPC subclasses
1
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B28B
|
3
|
shaping clay or other ceramic compositions, slag or mixtures containing cementitious material, e.g.
|
2
|
B28C
|
2
|
preparing clayproducing mixtures containing clay or cementitious material, e.g. plaster
|
3
|
E04C
|
1
|
Structural elements; building materials
|
4
|
C04B
|
1
|
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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