DIFF Subgroup
G05D 21/02 characterised by the use of electric means
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Control of chemical or physico-chemical variables, e.g. pH-value > characterised by the use of electric means
CPC:
Control of chemical or physico-chemical variables, e.g. pH value > characterised by the use of electric means
No child classifications to compare. This is a leaf node in both IPC and CPC.