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PCE
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DIFF Subgroup
C21D 1/40

Direct resistance heating

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Methods of heating > Direct resistance heating

CPC:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Methods of heating (C21D1/06 takes precedence) > Direct resistance heating

No child classifications to compare. This is a leaf node in both IPC and CPC.