Top IPC subclasses
1
|
C25B
|
4
|
Electrolytic or electrophoretic processes for the production of compounds or non- metals; apparatus therefor
|
2
|
C22C
|
1
|
alloys
|
3
|
C23C
|
1
|
Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general
|