DIFF Subgroup
G05F 3/08 wherein the variable is DC
Introduced: September 1968
Full Title
Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties > Regulating voltage or current > wherein the variable is DC
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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- G05F 3/10 using uncontrolled devices with non-linear characteristics IPC+CPC Available in IPC and CPC