Top IPC subclasses
1
|
F23G
|
2
|
Cremation furnaces; consuming waste or low grade fuels by combustion
|
2
|
C10B
|
2
|
destructive distillation of carbonaceous materials for production of gas, coke, tar, or similar mate
|
3
|
C10J
|
1
|
production of producer gas, water-gas, synthesis gas from solid carbonaceous material, or mixtures c
|