Top IPC subclasses
|
1
|
H01L
|
3
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
|
2
|
G03G
|
2
|
Electrography; electrophotography; magnetography
|
|
3
|
C07C
|
1
|
Acyclic or carbocyclic compounds
|
|
4
|
C08F
|
1
|
macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
|
|
5
|
G03C
|
1
|
photosensitive materials for photographic purposesphotographic processes, e.g. cine, x-ray, colour,
|