Top IPC subclasses
|
1
|
E04B
|
6
|
General building constructions; walls, e.g. partitions; roofs; floors; ceilings; insulation or other protection of buildings
|
|
2
|
E04C
|
4
|
Structural elements; building materials
|
|
3
|
C08L
|
3
|
Compositions of macromolecular compounds
|
|
4
|
B65D
|
3
|
Containers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers; accessories, closures, or fittings therefor; packaging elements; packages
|
|
5
|
B82B
|
1
|
nano-structuresmanufacture or treatment thereof
|
|
6
|
C01G
|
1
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
7
|
B22F
|
1
|
working metallic powdermanufacture of articles from metallic powdermaking metallic powder
|
|
8
|
B01J
|
1
|
Chemical or physical processes, e.g. catalysis, colloid chemistry; their relevant apparatus
|