Top IPC subclasses
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1
|
G03G
|
6
|
Electrography; electrophotography; magnetography
|
|
2
|
G11B
|
6
|
information storage based on relative movement between record carrier and transducer
|
|
3
|
G03C
|
6
|
photosensitive materials for photographic purposesphotographic processes, e.g. cine, x-ray, colour,
|
|
4
|
C08L
|
4
|
Compositions of macromolecular compounds
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|
5
|
C08F
|
3
|
macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
|
|
6
|
C01G
|
2
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
7
|
H01L
|
2
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
|
8
|
G11C
|
1
|
static stores
|
|
9
|
C07C
|
1
|
Acyclic or carbocyclic compounds
|
|
10
|
G03H
|
1
|
holographic processes or apparatus
|
|
11
|
G02B
|
1
|
optical elements, systems, or apparatus
|
|
12
|
C08C
|
1
|
treatment or chemical modification of rubbers
|
|
13
|
B82B
|
1
|
nano-structuresmanufacture or treatment thereof
|
|
14
|
H04R
|
1
|
loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-ai
|
|
15
|
C30B
|
1
|
single-crystal growthunidirectional solidification of eutectic material or unidirectional demixing o
|
|
16
|
G01B
|
1
|
measuring length, thickness, or similar linear dimensionsmeasuring anglesmeasuring areasmeasuring ir
|
|
17
|
G03F
|
1
|
photomechanical production of textured or patterned surfaces, e.g. for printing, for processing of s
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