Top IPC subclasses
1
|
E04B
|
7
|
General building constructions; walls, e.g. partitions; roofs; floors; ceilings; insulation or other protection of buildings
|
2
|
E04C
|
4
|
Structural elements; building materials
|
3
|
E02D
|
4
|
foundationsexcavationsembankmentsunderground or underwater structures
|
4
|
C09K
|
3
|
materials for applications not otherwise provided forapplications of materials not otherwise provide
|
5
|
F03C
|
2
|
positive-displacement engines driven by liquids
|
6
|
E04G
|
2
|
scaffoldingformsshutteringbuilding implements or other building aids, or their usehandling building
|
7
|
C04B
|
2
|
Lime; magnesia; slag; cements; compositions thereof, e.g. mortars, concrete or like building materials; artificial stone; ceramics; refractories; treatment of natural stone
|
8
|
B06B
|
1
|
generating or transmitting mechanical vibrations in general
|
9
|
B28B
|
1
|
shaping clay or other ceramic compositions, slag or mixtures containing cementitious material, e.g.
|