DIFF Subgroup
F24H 1/20 with immersed heating elements, e.g. electric elements or furnace tubes
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters > Water-storage heaters > with immersed heating elements, e.g. electric elements or furnace tubes
CPC:
Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters (steam boilers F22B) > Water-storage heaters > with immersed heating elements, e.g. electric elements or furnace tubes
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Child Classifications
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