Top IPC subclasses
1
|
B01D
|
4
|
Separation
|
2
|
F24H
|
4
|
fluid heaters, e.g. water or air heaters, having heat-generating means, in general
|
3
|
F24B
|
2
|
domestic stoves or ranges for solid fuelsimplements for use in connection with stoves or ranges
|
4
|
F23D
|
1
|
burners
|
5
|
C12P
|
1
|
fermentation or enzyme-using processes to synthesise a desired chemical compound or composition or t
|