Top IPC subclasses
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1
|
H04B
|
6
|
transmission
|
|
2
|
G01R
|
5
|
Measuring electric variables; measuring magnetic variables
|
|
3
|
G01N
|
3
|
Investigating or analysing materials by determining their chemical or physical properties
|
|
4
|
G01L
|
3
|
measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure
|
|
5
|
H02J
|
3
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circuit arrangements or systems for supplying or distributing electric powersystems for storing elec
|
|
6
|
A01C
|
2
|
Planting; sowing; fertilising
|
|
7
|
B82B
|
1
|
nano-structuresmanufacture or treatment thereof
|
|
8
|
H05B
|
1
|
electric heatingelectric lighting not otherwise provided for
|
|
9
|
C01G
|
1
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
10
|
H01L
|
1
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
|
11
|
F02N
|
1
|
starting of combustion enginesstarting aids for such engines, not otherwise provided for
|
|
12
|
F02G
|
1
|
hot-gas or combustion-product positive-displacement engine plantsuse of waste heat of combustion eng
|
|
13
|
H01B
|
1
|
cablesconductorsinsulatorsselection of materials for their conductive, insulating, or dielectric pro
|
|
14
|
A01P
|
1
|
Biocidal, pest repellant, pest attractant or plant growth regulatory activity of chemical compounds or preparations
|
|
15
|
H10N
|
1
|
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