DIFF Subgroup
H05B 31/48 having more than two electrodes
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Electric arc lamps > having more than two electrodes
CPC:
Electric arc lamps (regulating electric characteristics of arcs G05F1/02) > having more than two electrodes
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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