Top IPC subclasses
1
|
F24J
|
5
|
Production or use of heat not otherwise provided for
|
2
|
C02F
|
3
|
Treatment of water, waste water, sewage, or sludge
|
3
|
C25D
|
3
|
processes for the electrolytic or electrophoretic production of coatingselectroformingjoining workpi
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