Top IPC subclasses
1
|
F25B
|
10
|
refrigeration machines, plants, or systemscombined heating and refrigeration systemsheat pump system
|
2
|
A23C
|
4
|
dairy products, e.g. milk, butter, cheesemilk or cheese substitutesmaking thereof
|
3
|
F28F
|
1
|
details of heat-exchange or heat-transfer apparatus, of general application
|
4
|
F28D
|
1
|
heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do n
|