Top IPC subclasses
1
|
C25B
|
5
|
Electrolytic or electrophoretic processes for the production of compounds or non- metals; apparatus therefor
|
2
|
H01L
|
2
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
3
|
B01J
|
1
|
Chemical or physical processes, e.g. catalysis, colloid chemistry; their relevant apparatus
|