Top IPC subclasses
1
|
C07C
|
6
|
Acyclic or carbocyclic compounds
|
2
|
A62D
|
3
|
chemical means for extinguishing firesprocesses for making harmful chemical substances harmless, or
|
3
|
C07B
|
2
|
General methods of organic chemistry; apparatus therefor
|
4
|
G21F
|
2
|
protection against x-radiation, gamma radiation, corpuscular radiation or particle bombardmenttreati
|
5
|
F23G
|
1
|
Cremation furnaces; consuming waste or low grade fuels by combustion
|