Top IPC subclasses
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1
|
F23G
|
4
|
Cremation furnaces; consuming waste or low grade fuels by combustion
|
|
2
|
F03D
|
2
|
Wind motors
|
|
3
|
G21B
|
2
|
fusion reactors
|
|
4
|
C01B
|
2
|
non-metallic elementscompounds thereof
|
|
5
|
B27L
|
2
|
removing bark or vestiges of branchessplitting woodmanufacture of veneer, wooden sticks, wood shavin
|
|
6
|
B64C
|
1
|
aeroplaneshelicopters
|
|
7
|
H02K
|
1
|
dynamo-electric machines
|
|
8
|
C01G
|
1
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
9
|
A01N
|
1
|
Preservation of bodies of humans or animals or plants or parts thereof; biocides, e.g. as disinfectants, as pesticides or as herbicides; pest repellants or attractants; plant growth regulators
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