Top IPC subclasses
|
1
|
G03G
|
10
|
Electrography; electrophotography; magnetography
|
|
2
|
G08B
|
10
|
signalling or calling systemsorder telegraphsalarm systems
|
|
3
|
H01L
|
8
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
|
4
|
C07C
|
7
|
Acyclic or carbocyclic compounds
|
|
5
|
C09K
|
7
|
materials for applications not otherwise provided forapplications of materials not otherwise provide
|
|
6
|
B82Y
|
7
|
|
|
7
|
G11B
|
6
|
information storage based on relative movement between record carrier and transducer
|
|
8
|
G03C
|
5
|
photosensitive materials for photographic purposesphotographic processes, e.g. cine, x-ray, colour,
|
|
9
|
C08L
|
4
|
Compositions of macromolecular compounds
|
|
10
|
C01G
|
4
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
11
|
B82B
|
3
|
nano-structuresmanufacture or treatment thereof
|
|
12
|
C07F
|
3
|
acyclic, carbocyclic, or heterocyclic compounds containing elements other than carbon, hydrogen, hal
|
|
13
|
G11C
|
2
|
static stores
|
|
14
|
G03H
|
2
|
holographic processes or apparatus
|
|
15
|
G01T
|
2
|
measurement of nuclear or x-radiation
|
|
16
|
G01J
|
2
|
measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics o
|
|
17
|
C07D
|
1
|
Heterocyclic compounds
|
|
18
|
C01B
|
1
|
non-metallic elementscompounds thereof
|
|
19
|
G02B
|
1
|
optical elements, systems, or apparatus
|
|
20
|
C03C
|
1
|
chemical composition of glasses, glazes, or vitreous enamelssurface treatment of glasssurface treatm
|