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H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
H05B3/00—Ohmic-resistance heating
H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
H05B3/688—Fabrication of the plates
DK60357D1938-02-221939-02-15Fremgangsmaade til Fremstilling af elektrisk opvarmede Varmelegemer med Riller til Optagelse af Varmetraaden.
DK60357C
(da)