Top IPC subclasses
1
|
B01F
|
4
|
mixing, e.g. dissolving, emulsifying, dispersing
|
2
|
F23D
|
1
|
burners
|
3
|
F24J
|
1
|
Production or use of heat not otherwise provided for
|
4
|
F25B
|
1
|
refrigeration machines, plants, or systemscombined heating and refrigeration systemsheat pump system
|