Top IPC subclasses
|
1
|
H01L
|
7
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
|
2
|
G03G
|
6
|
Electrography; electrophotography; magnetography
|
|
3
|
C07C
|
4
|
Acyclic or carbocyclic compounds
|
|
4
|
B82B
|
4
|
nano-structuresmanufacture or treatment thereof
|
|
5
|
C01G
|
4
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
6
|
C09K
|
4
|
materials for applications not otherwise provided forapplications of materials not otherwise provide
|
|
7
|
C08L
|
3
|
Compositions of macromolecular compounds
|
|
8
|
G01N
|
3
|
Investigating or analysing materials by determining their chemical or physical properties
|
|
9
|
C08F
|
3
|
macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
|
|
10
|
C01B
|
2
|
non-metallic elementscompounds thereof
|
|
11
|
G03C
|
2
|
photosensitive materials for photographic purposesphotographic processes, e.g. cine, x-ray, colour,
|
|
12
|
G03H
|
1
|
holographic processes or apparatus
|